Add error handling for dynamic imports

Co-authored-by: Tyriar <2193314+Tyriar@users.noreply.github.com>
Add dynamic imports for AccessibilityManager and OverviewRulerRenderer
2026-01-16 01:58:45 +00:00 · 2026-01-16 01:56:13 +00:00 · 2026-01-16 01:14:01 +00:00 · 2026-01-16 01:12:01 +00:00 · 2026-01-16 00:41:57 +00:00 · 2026-01-16 00:40:40 +00:00
279 changed files with 22131 additions and 10822 deletions
@@ -22,10 +22,10 @@ npm run build && npm run esbuild # Build all TypeScript and bundle
 **Testing**:
 - Unit tests: `npm run test-unit` (Mocha)
 - Unit tests filtering to file: `npm run test-unit -- **/fileName.ts
- Per-addon unit tests: `npm run test-unit -- addons/addon-image/out-esbuild/*.test.js`
+- Per-addon unit tests: `npm run test-unit addons/addon-image/out-esbuild/*.test.js`
 - Integration tests: `npm run test-integration` (Playwright across Chrome/Firefox/WebKit)
 - Integration tests by file: `npm run test-integration -- test/playwright/InputHandler.test.ts`. Never use grep to filter tests, it doesn't work
- Integration tests by addon: `npm run test-integration -- --suite=addon-search`. Suites always follow the format `addon-<something>`
+- Integration tests by addon: `npm run test-integration --suite=addon-search`. Suites always follow the format `addon-<something>`
 - Lint changes: `npm run lint-changes` to lint only changed files, `npm run lint-changes-fix` to fix them

 ## Addon Development Pattern
@@ -1,18 +0,0 @@
---
-applyTo: '**/*.benchmark.ts'
---
-# Benchmark run instructions
-
- Full suite: `npm run benchmark`
- Single benchmark file:
-  - Tree: `npm run benchmark -- -t out-test/benchmark/Event.benchmark.js`
-  - Run file: `npm run benchmark -- -s "out-test/benchmark/Event.benchmark.js" out-test/benchmark/Event.benchmark.js`
- Single context/case:
-  - Use `-t` to get the path, then:
-  - `npm run benchmark -- -s "<path>" out-test/benchmark/Event.benchmark.js`
-
-When writing instructions, use `RuntimeCase` to measure pure runtime in ms, use `ThroughputRuntimeCase` when measuring throughput in MB/s.
-
-Notes:
- Benchmarks run from built JS in `out-test/benchmark/*.benchmark.js`.
- Keep `NODE_PATH=./out` (handled by the npm script).
@@ -1,3 +0,0 @@
-[submodule "vendor/ghostty"]
-	path = vendor/ghostty
-	url = https://github.com/ghostty-org/ghostty
@@ -12,7 +12,7 @@ interface IAttachOptions {
  bidirectional?: boolean;
 }

-export class AttachAddon implements ITerminalAddon, IAttachApi {
+export class AttachAddon implements ITerminalAddon , IAttachApi {
  private _socket: WebSocket;
  private _bidirectional: boolean;
  private _disposables: IDisposable[] = [];
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -33,7 +33,7 @@ function _getComputedStyle(el: HTMLElement): CSSStyleDeclaration {
  return getWindow(el).getComputedStyle(el, null);
 }

-export class FitAddon implements ITerminalAddon, IFitApi {
+export class FitAddon implements ITerminalAddon , IFitApi {
  private _terminal: Terminal | undefined;

  public activate(terminal: Terminal): void {
@@ -69,10 +69,9 @@ export class FitAddon implements ITerminalAddon, IFitApi {
      return undefined;
    }

-    const showScrollbar = this._terminal.options.scrollbar?.showScrollbar ?? true;
-    const scrollbarWidth = (this._terminal.options.scrollback === 0 || !showScrollbar
+    const scrollbarWidth = (this._terminal.options.scrollback === 0
      ? 0
-      : (this._terminal.options.scrollbar?.width ?? ViewportConstants.DEFAULT_SCROLL_BAR_WIDTH));
+      : (this._terminal.options.overviewRuler?.width || ViewportConstants.DEFAULT_SCROLL_BAR_WIDTH));

    const parentElementStyle = _getComputedStyle(this._terminal.element.parentElement);
    const parentElementHeight = parseInt(parentElementStyle.getPropertyValue('height'));
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -9,6 +9,10 @@ import Base64Decoder from 'xterm-wasm-parts/lib/base64/Base64Decoder.wasm';
 import { HeaderParser, IHeaderFields, HeaderState } from './IIPHeaderParser';
 import { imageType, UNSUPPORTED_TYPE } from './IIPMetrics';

+
+// eslint-disable-next-line
+declare const Buffer: any;
+
 // limit hold memory in base64 decoder
 const KEEP_DATA = 4194304;

@@ -101,8 +105,7 @@ export class IIPHandler implements IOscHandler, IResetHandler {
      return true;
    }

-    // HACK: The types on Blob are too restrictive, this is a Uint8Array so the browser accepts it
-    const blob = new Blob([this._dec.data8 as Uint8Array<ArrayBuffer>], { type: this._metrics.mime });
+    const blob = new Blob([new Uint8Array(this._dec.data8)], { type: this._metrics.mime });
    this._dec.release();

    if (!window.createImageBitmap) {
@@ -8,7 +8,6 @@ declare const Buffer: any;


 export interface IHeaderFields {
-  [key: string]: number | string | Uint32Array | null | undefined;
  // base-64 encoded filename. Defaults to "Unnamed file".
  name: string;
  // File size in bytes. The file transfer will be canceled if this size is exceeded.
@@ -82,7 +81,7 @@ function toName(data: Uint32Array): string {
  return new TextDecoder().decode(b);
 }

-const DECODERS: {[key: string]: (v: Uint32Array) => number | string} = {
+const DECODERS: {[key: string]: (v: Uint32Array) => any} = {
  inline: toInt,
  size: toInt,
  name: toName,
@@ -101,7 +100,7 @@ export class HeaderParser {
  private _buffer = new Uint32Array(MAX_FIELDCHARS);
  private _position = 0;
  private _key = '';
-  public fields: {[key: string]: number | string | Uint32Array | null | undefined} = {};
+  public fields: {[key: string]: any} = {};

  public reset(): void {
    this._buffer.fill(0);
@@ -48,7 +48,7 @@ const enum GaStatus {
 }


-export class ImageAddon implements ITerminalAddon, IImageApi {
+export class ImageAddon implements ITerminalAddon , IImageApi {
  private _opts: IImageAddonOptions;
  private _defaultOpts: IImageAddonOptions;
  private _storage: ImageStorage | undefined;
@@ -90,7 +90,7 @@ export class ImageAddon implements ITerminalAddon, IImageApi {
      // windowOptions.getCellSizePixels = true;
      // windowOptions.getWinSizeChars = true;
      // terminal.setOption('windowOptions', windowOptions);
-      const windowOps = terminal.options.windowOptions ?? {};
+      const windowOps = terminal.options.windowOptions || {};
      windowOps.getWinSizePixels = true;
      windowOps.getCellSizePixels = true;
      windowOps.getWinSizeChars = true;
@@ -6,7 +6,7 @@
 import { toRGBA8888 } from 'sixel/lib/Colors';
 import { IDisposable } from '@xterm/xterm';
 import { ICellSize, ITerminalExt, IImageSpec, IRenderDimensions, IRenderService } from './Types';
-import { Disposable, MutableDisposable, toDisposable } from 'common/Lifecycle';
+import { Disposable, MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';

 const PLACEHOLDER_LENGTH = 4096;
 const PLACEHOLDER_HEIGHT = 24;
@@ -38,7 +38,7 @@ export class ImageRenderer extends Disposable implements IDisposable {
     * Only the DOM output canvas should be on the terminal's document,
     * which gets explicitly checked in `insertLayerToDom`.
     */
-    const canvas = (localDocument ?? document).createElement('canvas');
+    const canvas = (localDocument || document).createElement('canvas');
    canvas.width = width | 0;
    canvas.height = height | 0;
    return canvas;
@@ -242,7 +242,7 @@ export class ImageRenderer extends Disposable implements IDisposable {
      }
      if (!this._placeholder) return;
      this._ctx.drawImage(
-        this._placeholderBitmap ?? this._placeholder!,
+        this._placeholderBitmap || this._placeholder!,
        col * width,
        (row * height) % 2 ? 0 : 1,  // needs %2 offset correction
        width * count,
@@ -132,10 +132,8 @@ export class ImageStorage implements IDisposable {
  ) {
    try {
      this.setLimit(this._opts.storageLimit);
-    } catch (e: unknown) {
-      if (e instanceof Error) {
-        console.error(e.message);
-      }
+    } catch (e: any) {
+      console.error(e.message);
      console.warn(`storageLimit is set to ${this.getLimit()} MB`);
    }
    this._viewportMetrics = {
@@ -383,7 +381,7 @@ export class ImageStorage implements IDisposable {
      if (!line) return;
      for (let col = 0; col < cols; ++col) {
        if (line.getBg(col) & BgFlags.HAS_EXTENDED) {
-          let e: IExtendedAttrsImage = line._extendedAttrs[col] ?? EMPTY_ATTRS;
+          let e: IExtendedAttrsImage = line._extendedAttrs[col] || EMPTY_ATTRS;
          const imageId = e.imageId;
          if (imageId === undefined || imageId === -1) {
            continue;
@@ -402,7 +400,7 @@ export class ImageStorage implements IDisposable {
            while (
              ++col < cols
              && (line.getBg(col) & BgFlags.HAS_EXTENDED)
-              && (e = line._extendedAttrs[col] ?? EMPTY_ATTRS)
+              && (e = line._extendedAttrs[col] || EMPTY_ATTRS)
              && (e.imageId === imageId)
              && (e.tileId === startTile + count)
            ) {
@@ -444,7 +442,7 @@ export class ImageStorage implements IDisposable {
    for (let row = 0; row < rows; ++row) {
      const line = buffer.lines.get(row) as IBufferLineExt;
      if (line.getBg(oldCol) & BgFlags.HAS_EXTENDED) {
-        const e: IExtendedAttrsImage = line._extendedAttrs[oldCol] ?? EMPTY_ATTRS;
+        const e: IExtendedAttrsImage = line._extendedAttrs[oldCol] || EMPTY_ATTRS;
        const imageId = e.imageId;
        if (imageId === undefined || imageId === -1) {
          continue;
@@ -489,7 +487,7 @@ export class ImageStorage implements IDisposable {
    const buffer = this._terminal._core.buffer;
    const line = buffer.lines.get(y) as IBufferLineExt;
    if (line && line.getBg(x) & BgFlags.HAS_EXTENDED) {
-      const e: IExtendedAttrsImage = line._extendedAttrs[x] ?? EMPTY_ATTRS;
+      const e: IExtendedAttrsImage = line._extendedAttrs[x] || EMPTY_ATTRS;
      if (e.imageId && e.imageId !== -1) {
        const orig = this._images.get(e.imageId)?.orig;
        if (window.ImageBitmap && orig instanceof ImageBitmap) {
@@ -509,7 +507,7 @@ export class ImageStorage implements IDisposable {
    const buffer = this._terminal._core.buffer;
    const line = buffer.lines.get(y) as IBufferLineExt;
    if (line && line.getBg(x) & BgFlags.HAS_EXTENDED) {
-      const e: IExtendedAttrsImage = line._extendedAttrs[x] ?? EMPTY_ATTRS;
+      const e: IExtendedAttrsImage = line._extendedAttrs[x] || EMPTY_ATTRS;
      if (e.imageId && e.imageId !== -1 && e.tileId !== -1) {
        const spec = this._images.get(e.imageId);
        if (spec) {
@@ -15,6 +15,7 @@
    "paths": {
      "browser/*": [ "../../../src/browser/*" ],
      "common/*": [ "../../../src/common/*" ],
+      "vs/*": [ "../../../src/vs/*" ],
      "@xterm/addon-image": [ "../typings/addon-image.d.ts" ]
    }
  },
@@ -24,6 +25,7 @@
  ],
  "references": [
    { "path": "../../../src/browser" },
-    { "path": "../../../src/common" }
+    { "path": "../../../src/common" },
+    { "path": "../../../src/vs" }
  ]
 }
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -13,7 +13,7 @@ export interface ITerminalAddon {
  dispose(): void;
 }

-export class LigaturesAddon implements ITerminalAddon, ILigaturesApi {
+export class LigaturesAddon implements ITerminalAddon , ILigaturesApi {
  private readonly _fallbackLigatures: string[];
  private readonly _fontFeatureSettings?: string;

@@ -22,7 +22,7 @@ export class LigaturesAddon implements ITerminalAddon, ILigaturesApi {

  constructor(options?: Partial<ILigatureOptions>) {
    // Source: calt set from https://github.com/be5invis/Iosevka?tab=readme-ov-file#ligations
-    this._fallbackLigatures = (options?.fallbackLigatures ?? [
+    this._fallbackLigatures = (options?.fallbackLigatures || [
      '<--', '<---', '<<-', '<-', '->', '->>', '-->', '--->',
      '<==', '<===', '<<=', '<=', '=>', '=>>', '==>', '===>', '>=', '>>=',
      '<->', '<-->', '<--->', '<---->', '<=>', '<==>', '<===>', '<====>', '::', ':::',
@@ -42,11 +42,11 @@ export default async function load(fontFamily: string, cacheSize: number): Promi
        if (status && status.state !== 'granted') {
          throw new Error('Permission to access local fonts not granted.');
        }
-      } catch (err: unknown) {
+      } catch (err: any) {
        // A `TypeError` indicates the 'local-fonts'
        // permission is not yet implemented, so
        // only `throw` if this is _not_ the problem.
-        if (err instanceof Error && err.name !== 'TypeError') {
+        if (err.name !== 'TypeError') {
          throw err;
        }
      }
@@ -60,10 +60,8 @@ export default async function load(fontFamily: string, cacheSize: number): Promi
          fonts[metadata.family].push(metadata);
        }
        fontsPromise = Promise.resolve(fonts);
-      } catch (err: unknown) {
-        if (err instanceof Error) {
-          console.error(err.name, err.message);
-        }
+      } catch (err: any) {
+        console.error(err.name, err.message);
      }
    }
    // Latest proposal https://bugs.chromium.org/p/chromium/issues/detail?id=1312603
@@ -78,13 +76,13 @@ export default async function load(fontFamily: string, cacheSize: number): Promi
          fonts[metadata.family].push(metadata);
        }
        fontsPromise = Promise.resolve(fonts);
-      } catch (err: unknown) {
-        if (err instanceof Error) {
-          console.error(err.name, err.message);
-        }
+      } catch (err: any) {
+        console.error(err.name, err.message);
      }
    }
-    fontsPromise ??= Promise.resolve({});
+    if (!fontsPromise) {
+      fontsPromise = Promise.resolve({});
+    }
  }

  const fonts = await fontsPromise;
@@ -52,10 +52,12 @@ export function processLookaheadPosition(
    }
    processedEntries.add(currentEntry.entry);

-    currentEntry.entry.forward ??= {
-      individual: {},
-      range: []
-    };
+    if (!currentEntry.entry.forward) {
+      currentEntry.entry.forward = {
+        individual: {},
+        range: []
+      };
+    }

    // All glyphs at this position share ONE entry - lookahead just needs to match,
    // all paths lead to the same result
@@ -95,10 +97,12 @@ export function processBacktrackPosition(
    }
    processedEntries.add(currentEntry.entry);

-    currentEntry.entry.reverse ??= {
-      individual: {},
-      range: []
-    };
+    if (!currentEntry.entry.reverse) {
+      currentEntry.entry.reverse = {
+        individual: {},
+        range: []
+      };
+    }

    // All glyphs at this position share ONE entry - backtrack just needs to match,
    // all paths lead to the same result
@@ -54,6 +54,9 @@ export function getIndividualSubstitutionGlyph(table: SubstitutionTable, glyphId
      return (glyphId + table.deltaGlyphId) % (2 ** 16);
    // https://docs.microsoft.com/en-us/typography/opentype/spec/gsub#12-single-substitution-format-2
    case 2:
-      return table.substitute[coverageIndex] ?? null;
+      // eslint-disable-next-line eqeqeq
+      return table.substitute[coverageIndex] != null
+        ? table.substitute[coverageIndex]
+        : null;
  }
 }
@@ -30,7 +30,7 @@ export function enableLigatures(term: Terminal, fallbackLigatures: string[] = []
  let currentFontName: string | undefined = undefined;
  let font: Font | undefined = undefined;
  let loadingState: LoadingState = LoadingState.UNLOADED;
-  let loadError: unknown = undefined;
+  let loadError: any | undefined = undefined;

  return term.registerCharacterJoiner((text: string): [number, number][] => {
    // If the font hasn't been loaded yet, load it and return an empty result
@@ -5,7 +5,7 @@

 import type { Terminal, ITerminalAddon, IDisposable } from '@xterm/xterm';
 import type { ProgressAddon as IProgressApi, IProgressState } from '@xterm/addon-progress';
-import type { Emitter, IEvent } from 'common/Event';
+import type { Emitter, Event } from 'vs/base/common/event';


 const enum ProgressType {
@@ -39,7 +39,7 @@ export class ProgressAddon implements ITerminalAddon, IProgressApi {
  private _pr = 0;
  // HACK: This uses ! to align with the API, this should be fixed when 5283 is resolved
  private _onChange!: Emitter<IProgressState>;
-  public onChange!: IEvent<IProgressState>;
+  public onChange!: Event<IProgressState>;

  public dispose(): void {
    this._seqHandler?.dispose();
@@ -15,12 +15,12 @@
      "../../../node_modules/@types/mocha"
    ],
    "paths": {
-      "common/*": [
-        "../../../src/common/*"
-      ],
      "browser/*": [
        "../../../src/browser/*"
      ],
+      "vs/*": [
+        "../../../src/vs/*"
+      ],
      "@xterm/addon-progress": [
        "../typings/addon-progress.d.ts"
      ]
@@ -35,7 +35,7 @@
      "path": "../../../src/browser"
    },
    {
-      "path": "../../../src/common"
+      "path": "../../../src/vs"
    }
  ]
 }
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -5,7 +5,7 @@

 import type { Terminal, IDisposable, IDecoration } from '@xterm/xterm';
 import type { ISearchDecorationOptions } from '@xterm/addon-search';
-import { dispose, Disposable, toDisposable } from 'common/Lifecycle';
+import { dispose, Disposable, toDisposable } from 'vs/base/common/lifecycle';
 import type { ISearchResult } from './SearchEngine';

 /**
@@ -4,10 +4,10 @@
 */

 import type { Terminal, IDisposable, ITerminalAddon } from '@xterm/xterm';
-import type { SearchAddon as ISearchApi, ISearchOptions, ISearchAddonOptions, ISearchResultChangeEvent, ISearchDecorationOptions } from '@xterm/addon-search';
-import { Emitter, type IEvent } from 'common/Event';
-import { Disposable, MutableDisposable, toDisposable } from 'common/Lifecycle';
-import { disposableTimeout } from 'common/Async';
+import type { SearchAddon as ISearchApi, ISearchOptions, ISearchAddonOptions, ISearchResultChangeEvent } from '@xterm/addon-search';
+import { Emitter, Event } from 'vs/base/common/event';
+import { Disposable, MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
+import { disposableTimeout } from 'vs/base/common/async';
 import { SearchLineCache } from './SearchLineCache';
 import { SearchState } from './SearchState';
 import { SearchEngine, type ISearchResult } from './SearchEngine';
@@ -47,7 +47,7 @@ export class SearchAddon extends Disposable implements ITerminalAddon, ISearchAp
  private readonly _onBeforeSearch = this._register(new Emitter<void>());
  public readonly onBeforeSearch = this._onBeforeSearch.event;

-  public get onDidChangeResults(): IEvent<ISearchResultChangeEvent> {
+  public get onDidChangeResults(): Event<ISearchResultChangeEvent> {
    return this._resultTracker.onDidChangeResults;
  }

@@ -222,7 +222,7 @@ export class SearchAddon extends Disposable implements ITerminalAddon, ISearchAp
   * @param result The result to select.
   * @returns Whether a result was selected.
   */
-  private _selectResult(result: ISearchResult | undefined, options?: ISearchDecorationOptions, noScroll?: boolean): boolean {
+  private _selectResult(result: ISearchResult | undefined, options?: any, noScroll?: boolean): boolean {
    if (!this._terminal || !this._decorationManager) {
      return false;
    }
@@ -7,7 +7,7 @@ import { SearchEngine } from './SearchEngine';
 import { SearchLineCache } from './SearchLineCache';
 import { Terminal } from 'browser/public/Terminal';
 import type { ISearchOptions } from '@xterm/addon-search';
-import { DisposableStore } from 'common/Lifecycle';
+import { DisposableStore } from 'vs/base/common/lifecycle';

 function writeP(terminal: Terminal, data: string): Promise<void> {
  return new Promise(r => terminal.write(data, r));
@@ -64,9 +64,6 @@ export class SearchEngine {
      throw new Error(`Invalid col: ${startCol} to search in terminal of ${this._terminal.cols} cols`);
    }

-    startRow = Math.max(0, startRow);
-    startCol = Math.max(0, startCol);
-
    this._lineCache.initLinesCache();

    const searchPosition: ISearchPosition = {
@@ -201,7 +198,9 @@ export class SearchEngine {
      }
    }

-    result ??= this._findInLine(term, searchPosition, searchOptions, isReverseSearch);
+    if (!result) {
+      result = this._findInLine(term, searchPosition, searchOptions, isReverseSearch);
+    }

    // Search from startRow - 1 to top
    if (!result) {
@@ -5,7 +5,7 @@
 import { assert } from 'chai';
 import { SearchLineCache, LineCacheEntry } from './SearchLineCache';
 import { Terminal } from 'browser/public/Terminal';
-import { timeout } from 'common/Async';
+import { timeout } from 'vs/base/common/async';

 function writeP(terminal: Terminal, data: string): Promise<void> {
  return new Promise(r => terminal.write(data, r));
@@ -4,8 +4,8 @@
 */

 import type { Terminal } from '@xterm/xterm';
-import { combinedDisposable, Disposable, MutableDisposable, toDisposable } from 'common/Lifecycle';
-import { disposableTimeout } from 'common/Async';
+import { combinedDisposable, Disposable, MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
+import { disposableTimeout } from 'vs/base/common/async';

 export type LineCacheEntry = [
  /**
@@ -5,8 +5,8 @@

 import type { ISearchResultChangeEvent } from '@xterm/addon-search';
 import type { IDisposable } from '@xterm/xterm';
-import { Emitter, type IEvent } from 'common/Event';
-import { Disposable } from 'common/Lifecycle';
+import { Emitter, Event } from 'vs/base/common/event';
+import { Disposable } from 'vs/base/common/lifecycle';
 import type { ISearchResult } from './SearchEngine';

 /**
@@ -25,7 +25,7 @@ export class SearchResultTracker extends Disposable {
  private _selectedDecoration: ISelectedDecoration | undefined;

  private readonly _onDidChangeResults = this._register(new Emitter<ISearchResultChangeEvent>());
-  public get onDidChangeResults(): IEvent<ISearchResultChangeEvent> { return this._onDidChangeResults.event; }
+  public get onDidChangeResults(): Event<ISearchResultChangeEvent> { return this._onDidChangeResults.event; }

  /**
   * Gets the current search results.
@@ -21,6 +21,9 @@
      "browser/*": [
        "../../../src/browser/*"
      ],
+      "vs/*": [
+        "../../../src/vs/*"
+      ],
      "@xterm/addon-search" : [
        "../typings/addon-search.d.ts"
      ]
@@ -36,6 +39,9 @@
    },
    {
      "path": "../../../src/browser"
+    },
+    {
+      "path": "../../../src/vs"
    }
  ]
 }
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -116,7 +116,7 @@ describe('SerializeAddon', () => {
    describe('underline styles', () => {
      it('should serialize single underline with style', async () => {
        await writeP(terminal, sgr('4:1') + 'test' + sgr('24'));
-        assert.equal(serializeAddon.serialize(), '\u001b[4mtest\u001b[0m');
+        assert.equal(serializeAddon.serialize(), '\u001b[4:1mtest\u001b[0m');
      });

      it('should serialize double underline', async () => {
@@ -228,7 +228,7 @@ describe('SerializeAddon', () => {
    it('empty terminal with selection turned off', () => {
      const output = serializeAddon.serializeAsHTML();
      assert.notEqual(output, '');
-      assert.equal((output.match(/<div><span> {10}<\/span><\/div>/g) ?? []).length, 2);
+      assert.equal((output.match(/<div><span> {10}<\/span><\/div>/g) || []).length, 2);
    });

    it('empty terminal with no selection', () => {
@@ -245,7 +245,7 @@ describe('SerializeAddon', () => {
      const output = serializeAddon.serializeAsHTML({
        onlySelection: true
      });
-      assert.equal((output.match(/<div><span>terminal<\/span><\/div>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<div><span>terminal<\/span><\/div>/g) || []).length, 1, output);
    });

    it('basic terminal with html unsafe chars', async () => {
@@ -255,7 +255,7 @@ describe('SerializeAddon', () => {
      const output = serializeAddon.serializeAsHTML({
        onlySelection: true
      });
-      assert.equal((output.match(/<div><span>&lt;a>&amp;pi;<\/span><\/div>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<div><span>&lt;a>&amp;pi;<\/span><\/div>/g) || []).length, 1, output);
    });

    it('serializes rows within a provided range', async () => {
@@ -267,7 +267,7 @@ describe('SerializeAddon', () => {
          startCol: 4
        }
      });
-      const rowMatches = output.match(/<div><span>.*?<\/span><\/div>/g) ?? [];
+      const rowMatches = output.match(/<div><span>.*?<\/span><\/div>/g) || [];
      assert.equal(rowMatches.length, 1, output);
      assert.ok(rowMatches[0]?.includes('hello'));
      assert.ok(!output.includes('bye'));
@@ -278,56 +278,56 @@ describe('SerializeAddon', () => {
      await writeP(terminal, ' ' + sgr('1') + 'terminal' + sgr('22') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='font-weight: bold;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='font-weight: bold;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with italic styling', async () => {
      await writeP(terminal, ' ' + sgr('3') + 'terminal' + sgr('23') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='font-style: italic;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='font-style: italic;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with inverse styling', async () => {
      await writeP(terminal, ' ' + sgr('7') + 'terminal' + sgr('27') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='color: #000000; background-color: #BFBFBF;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='color: #000000; background-color: #BFBFBF;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with underline styling', async () => {
      await writeP(terminal, ' ' + sgr('4') + 'terminal' + sgr('24') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='text-decoration: underline;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='text-decoration: underline;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with double underline styling', async () => {
      await writeP(terminal, ' ' + sgr('4:2') + 'terminal' + sgr('24') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='text-decoration: underline double;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='text-decoration: underline double;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with curly underline styling', async () => {
      await writeP(terminal, ' ' + sgr('4:3') + 'terminal' + sgr('24') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='text-decoration: underline wavy;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='text-decoration: underline wavy;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with dotted underline styling', async () => {
      await writeP(terminal, ' ' + sgr('4:4') + 'terminal' + sgr('24') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='text-decoration: underline dotted;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='text-decoration: underline dotted;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with dashed underline styling', async () => {
      await writeP(terminal, ' ' + sgr('4:5') + 'terminal' + sgr('24') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='text-decoration: underline dashed;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='text-decoration: underline dashed;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with underline color (palette)', async () => {
@@ -350,49 +350,49 @@ describe('SerializeAddon', () => {
      await writeP(terminal, ' ' + sgr('8') + 'terminal' + sgr('28') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='visibility: hidden;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='visibility: hidden;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with dim styling', async () => {
      await writeP(terminal, ' ' + sgr('2') + 'terminal' + sgr('22') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='opacity: 0.5;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='opacity: 0.5;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with strikethrough styling', async () => {
      await writeP(terminal, ' ' + sgr('9') + 'terminal' + sgr('29') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='text-decoration: line-through;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='text-decoration: line-through;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with combined styling', async () => {
      await writeP(terminal, sgr('1') + ' ' + sgr('9') + 'termi' + sgr('22') + 'nal' + sgr('29') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='font-weight: bold;'> <\/span>/g) ?? []).length, 1, output);
-      assert.equal((output.match(/<span style='font-weight: bold; text-decoration: line-through;'>termi<\/span>/g) ?? []).length, 1, output);
-      assert.equal((output.match(/<span style='text-decoration: line-through;'>nal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='font-weight: bold;'> <\/span>/g) || []).length, 1, output);
+      assert.equal((output.match(/<span style='font-weight: bold; text-decoration: line-through;'>termi<\/span>/g) || []).length, 1, output);
+      assert.equal((output.match(/<span style='text-decoration: line-through;'>nal<\/span>/g) || []).length, 1, output);
    });

    it('cells with color styling', async () => {
      await writeP(terminal, ' ' + sgr('38;5;46') + 'terminal' + sgr('39') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='color: #00ff00;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='color: #00ff00;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with background styling', async () => {
      await writeP(terminal, ' ' + sgr('48;5;46') + 'terminal' + sgr('49') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='background-color: #00ff00;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='background-color: #00ff00;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('empty terminal with default options', async () => {
      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/color: #000000; background-color: #ffffff; font-family: monospace; font-size: 15px;/g) ?? []).length, 1, output);
+      assert.equal((output.match(/color: #000000; background-color: #ffffff; font-family: monospace; font-size: 15px;/g) || []).length, 1, output);
    });

    it('empty terminal with custom options', async () => {
@@ -405,14 +405,14 @@ describe('SerializeAddon', () => {
      const output = serializeAddon.serializeAsHTML({
        includeGlobalBackground: true
      });
-      assert.equal((output.match(/color: #ff00ff; background-color: #00ff00; font-family: verdana; font-size: 20px;/g) ?? []).length, 1, output);
+      assert.equal((output.match(/color: #ff00ff; background-color: #00ff00; font-family: verdana; font-size: 20px;/g) || []).length, 1, output);
    });

    it('empty terminal with background included', async () => {
      const output = serializeAddon.serializeAsHTML({
        includeGlobalBackground: true
      });
-      assert.equal((output.match(/color: #ffffff; background-color: #000000; font-family: monospace; font-size: 15px;/g) ?? []).length, 1, output);
+      assert.equal((output.match(/color: #ffffff; background-color: #000000; font-family: monospace; font-size: 15px;/g) || []).length, 1, output);
    });

    it('cells with custom color styling', async () => {
@@ -422,7 +422,7 @@ describe('SerializeAddon', () => {
      await writeP(terminal, ' ' + sgr('38;5;0') + 'terminal' + sgr('39') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='color: #ffa500;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='color: #ffa500;'>terminal<\/span>/g) || []).length, 1, output);
    });

    it('cells with color styling - xterm headless', async () => {
@@ -432,7 +432,7 @@ describe('SerializeAddon', () => {
      await writeP(terminal, ' ' + sgr('38;5;46') + 'terminal' + sgr('39') + ' ');

      const output = serializeAddon.serializeAsHTML();
-      assert.equal((output.match(/<span style='color: #00ff00;'>terminal<\/span>/g) ?? []).length, 1, output);
+      assert.equal((output.match(/<span style='color: #00ff00;'>terminal<\/span>/g) || []).length, 1, output);
    });
  });
 });
@@ -89,19 +89,11 @@ function equalUnderline(cell1: IBufferCell | IAttributeData, cell2: IBufferCell)
  if (!cell1.isUnderline() && !cell2.isUnderline()) {
    return true;
  }
-  if (cell1.getUnderlineStyle() !== cell2.getUnderlineStyle()) {
-    return false;
-  }
-  const cell1Default = cell1.isUnderlineColorDefault();
-  const cell2Default = cell2.isUnderlineColorDefault();
-  if (cell1Default && cell2Default) {
-    return true;
-  }
-  if (cell1Default !== cell2Default) {
-    return false;
-  }
-  return cell1.getUnderlineColor() === cell2.getUnderlineColor()
-    && cell1.getUnderlineColorMode() === cell2.getUnderlineColorMode();
+  const cell1Data = cell1 as unknown as IAttributeData;
+  const cell2Data = cell2 as unknown as IAttributeData;
+  return cell1Data.getUnderlineStyle() === cell2Data.getUnderlineStyle()
+    && cell1Data.getUnderlineColor() === cell2Data.getUnderlineColor()
+    && cell1Data.getUnderlineColorMode() === cell2Data.getUnderlineColorMode();
 }

 function equalFlags(cell1: IBufferCell | IAttributeData, cell2: IBufferCell): boolean {
@@ -117,16 +109,6 @@ function equalFlags(cell1: IBufferCell | IAttributeData, cell2: IBufferCell): bo
    && cell1.isStrikethrough() === cell2.isStrikethrough();
 }

-function attributesEquals(cell1: IBufferCell | IAttributeData, cell2: IBufferCell): boolean {
-  const cell1AsBufferCell = cell1 as IBufferCell;
-  if (typeof cell1AsBufferCell.attributesEquals === 'function') {
-    return cell1AsBufferCell.attributesEquals(cell2);
-  }
-  return equalFg(cell1, cell2)
-    && equalBg(cell1, cell2)
-    && equalFlags(cell1, cell2);
-}
-
 class StringSerializeHandler extends BaseSerializeHandler {
  private _rowIndex: number = 0;
  private _allRows: string[] = new Array<string>();
@@ -276,9 +258,6 @@ class StringSerializeHandler extends BaseSerializeHandler {

  private _diffStyle(cell: IBufferCell | IAttributeData, oldCell: IBufferCell): number[] {
    const sgrSeq: number[] = [];
-    if (attributesEquals(cell, oldCell)) {
-      return sgrSeq;
-    }
    const fgChanged = !equalFg(cell, oldCell);
    const bgChanged = !equalBg(cell, oldCell);
    const flagsChanged = !equalFlags(cell, oldCell);
@@ -311,18 +290,17 @@ class StringSerializeHandler extends BaseSerializeHandler {
          if (cell.isInverse() !== oldCell.isInverse()) { sgrSeq.push(cell.isInverse() ? 7 : 27); }
          if (cell.isBold() !== oldCell.isBold()) { sgrSeq.push(cell.isBold() ? 1 : 22); }
          if (!equalUnderline(cell, oldCell)) {
-            const style = cell.getUnderlineStyle();
+            const cellData = cell as unknown as IAttributeData;
+            const style = cellData.getUnderlineStyle();
            if (style === UnderlineStyle.NONE) {
              sgrSeq.push(24);
-            } else if (style === UnderlineStyle.SINGLE && cell.isUnderlineColorDefault()) {
-              sgrSeq.push(4);
            } else {
              // Use SGR 4:X format for underline styles
              sgrSeq.push('4:' + style as unknown as number);
              // Handle underline color
-              if (!cell.isUnderlineColorDefault()) {
-                const color = cell.getUnderlineColor();
-                if (cell.isUnderlineColorRGB()) {
+              if (!cellData.isUnderlineColorDefault()) {
+                const color = cellData.getUnderlineColor();
+                if (cellData.isUnderlineColorRGB()) {
                  sgrSeq.push('58:2::' + ((color >>> 16) & 0xFF) + ':' + ((color >>> 8) & 0xFF) + ':' + (color & 0xFF) as unknown as number);
                } else {
                  sgrSeq.push('58:5:' + color as unknown as number);
@@ -479,7 +457,7 @@ class StringSerializeHandler extends BaseSerializeHandler {
  }
 }

-export class SerializeAddon implements ITerminalAddon, ISerializeApi {
+export class SerializeAddon implements ITerminalAddon , ISerializeApi {
  private _terminal: Terminal | undefined;

  public activate(terminal: Terminal): void {
@@ -623,7 +601,7 @@ export class SerializeAddon implements ITerminalAddon, ISerializeApi {
      throw new Error('Cannot use addon until it has been loaded');
    }

-    return this._serializeBufferAsHTML(this._terminal, options ?? {});
+    return this._serializeBufferAsHTML(this._terminal, options || {});
  }

  public dispose(): void { }
@@ -652,6 +630,20 @@ export class HTMLSerializeHandler extends BaseSerializeHandler {
    }
  }

+  private _padStart(target: string, targetLength: number, padString: string): string {
+    targetLength = targetLength >> 0;
+    padString = padString ?? ' ';
+    if (target.length > targetLength) {
+      return target;
+    }
+
+    targetLength -= target.length;
+    if (targetLength > padString.length) {
+      padString += padString.repeat(targetLength / padString.length);
+    }
+    return padString.slice(0, targetLength) + target;
+  }
+
  protected _beforeSerialize(rows: number, start: number, end: number): void {
    this._htmlContent += '<html><body><!--StartFragment--><pre>';

@@ -688,7 +680,7 @@ export class HTMLSerializeHandler extends BaseSerializeHandler {
        (color >>  8) & 255,
        (color      ) & 255
      ];
-      return '#' + rgb.map(x => x.toString(16).padStart(2, '0')).join('');
+      return '#' + rgb.map(x => this._padStart(x.toString(16), 2, '0')).join('');
    }
    if (isFg ? cell.isFgPalette() : cell.isBgPalette()) {
      return this._ansiColors[color].css;
@@ -697,24 +689,26 @@ export class HTMLSerializeHandler extends BaseSerializeHandler {
  }

  private _getUnderlineColor(cell: IBufferCell): string | undefined {
-    if (cell.isUnderlineColorDefault()) {
+    const cellData = cell as unknown as IAttributeData;
+    if (cellData.isUnderlineColorDefault()) {
      return undefined;
    }
-    const color = cell.getUnderlineColor();
-    if (cell.isUnderlineColorRGB()) {
+    const color = cellData.getUnderlineColor();
+    if (cellData.isUnderlineColorRGB()) {
      const rgb = [
        (color >> 16) & 255,
        (color >>  8) & 255,
        (color      ) & 255
      ];
-      return '#' + rgb.map(x => x.toString(16).padStart(2, '0')).join('');
+      return '#' + rgb.map(x => this._padStart(x.toString(16), 2, '0')).join('');
    }
    // Palette color
    return this._ansiColors[color].css;
  }

  private _getUnderlineStyle(cell: IBufferCell): string {
-    switch (cell.getUnderlineStyle()) {
+    const cellData = cell as unknown as IAttributeData;
+    switch (cellData.getUnderlineStyle()) {
      case UnderlineStyle.SINGLE:
        return 'underline';
      case UnderlineStyle.DOUBLE:
@@ -733,10 +727,6 @@ export class HTMLSerializeHandler extends BaseSerializeHandler {
  private _diffStyle(cell: IBufferCell, oldCell: IBufferCell): string[] | undefined {
    const content: string[] = [];

-    if (attributesEquals(cell, oldCell)) {
-      return undefined;
-    }
-
    const fgChanged = !equalFg(cell, oldCell);
    const bgChanged = !equalBg(cell, oldCell);
    const flagsChanged = !equalFlags(cell, oldCell);
@@ -203,46 +203,6 @@ test.describe('SerializeAddon', () => {
    strictEqual(await ctx.page.evaluate(`window.serialize.serialize();`), lines.join('\r\n'));
  });

-  test('buffer cell attributesEquals compares underline style and color', async () => {
-    await ctx.proxy.write(`${sgr(UNDERLINE_DOUBLE, UNDERLINE_COLOR_RED)}A${sgr(UNDERLINE_DOUBLE, UNDERLINE_COLOR_RED)}B${sgr(NORMAL)}`);
-    const sameAttributes = await ctx.page.evaluate(`(() => {
-      const line = window.term.buffer.active.getLine(0);
-      const cellA = line?.getCell(0);
-      const cellB = line?.getCell(1);
-      if (!cellA || !cellB) {
-        return undefined;
-      }
-      return cellA.attributesEquals(cellB);
-    })()`);
-    strictEqual(sameAttributes, true);
-
-    await ctx.page.evaluate(`window.term.reset()`);
-    await ctx.proxy.write(`${sgr(UNDERLINE_DOUBLE, UNDERLINE_COLOR_RED)}A${sgr(UNDERLINE_DOUBLE, UNDERLINE_COLOR_GREEN)}B${sgr(NORMAL)}`);
-    const differentColor = await ctx.page.evaluate(`(() => {
-      const line = window.term.buffer.active.getLine(0);
-      const cellA = line?.getCell(0);
-      const cellB = line?.getCell(1);
-      if (!cellA || !cellB) {
-        return undefined;
-      }
-      return cellA.attributesEquals(cellB);
-    })()`);
-    strictEqual(differentColor, false);
-
-    await ctx.page.evaluate(`window.term.reset()`);
-    await ctx.proxy.write(`${sgr(UNDERLINE_DOUBLE, UNDERLINE_COLOR_RED)}A${sgr(UNDERLINED, UNDERLINE_COLOR_RED)}B${sgr(NORMAL)}`);
-    const differentStyle = await ctx.page.evaluate(`(() => {
-      const line = window.term.buffer.active.getLine(0);
-      const cellA = line?.getCell(0);
-      const cellB = line?.getCell(1);
-      if (!cellA || !cellB) {
-        return undefined;
-      }
-      return cellA.attributesEquals(cellB);
-    })()`);
-    strictEqual(differentStyle, false);
-  });
-
  test('serialize all rows of content with color256', async function(): Promise<any> {
    const rows = 32;
    const cols = 10;
@@ -642,9 +602,6 @@ const BOLD = '1';
 const DIM = '2';
 const ITALIC = '3';
 const UNDERLINED = '4';
-const UNDERLINE_DOUBLE = '4:2';
-const UNDERLINE_COLOR_RED = '58;5;196';
-const UNDERLINE_COLOR_GREEN = '58;5;46';
 const BLINK = '5';
 const INVERSE = '7';
 const INVISIBLE = '8';
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -9,15 +9,19 @@ import type { Terminal, ITerminalAddon, IUnicodeHandling } from '@xterm/xterm';
 import type { UnicodeGraphemesAddon as IUnicodeGraphemesApi } from '@xterm/addon-unicode-graphemes';
 import { UnicodeGraphemeProvider } from './UnicodeGraphemeProvider';

-export class UnicodeGraphemesAddon implements ITerminalAddon, IUnicodeGraphemesApi {
+export class UnicodeGraphemesAddon implements ITerminalAddon , IUnicodeGraphemesApi {
  private _provider15Graphemes?: UnicodeGraphemeProvider;
  private _provider15?: UnicodeGraphemeProvider;
  private _unicode?: IUnicodeHandling;
  private _oldVersion: string = '';

  public activate(terminal: Terminal): void {
-    this._provider15 ??= new UnicodeGraphemeProvider(false);
-    this._provider15Graphemes ??= new UnicodeGraphemeProvider(true);
+    if (! this._provider15) {
+      this._provider15 = new UnicodeGraphemeProvider(false);
+    }
+    if (! this._provider15Graphemes) {
+      this._provider15Graphemes = new UnicodeGraphemeProvider(true);
+    }
    const unicode = terminal.unicode;
    this._unicode = unicode;
    unicode.register(this._provider15);
@@ -1,7 +1,7 @@
 import UnicodeTrie from './unicode-trie';
 const trieRaw = "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";

-declare const Buffer: { from(s: string, encoding: string): Uint8Array } | undefined;
+declare const Buffer: any;
 function _dec(s: string): Uint8Array {
    if (typeof Buffer !== 'undefined') return Buffer.from(s, 'base64');
    const bs = atob(s);
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -9,7 +9,7 @@ import type { Terminal, ITerminalAddon } from '@xterm/xterm';
 import type { Unicode11Addon as IUnicode11Api } from '@xterm/addon-unicode11';
 import { UnicodeV11 } from './UnicodeV11';

-export class Unicode11Addon implements ITerminalAddon, IUnicode11Api {
+export class Unicode11Addon implements ITerminalAddon , IUnicode11Api {
  public activate(terminal: Terminal): void {
    terminal.unicode.register(new UnicodeV11());
  }
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -35,7 +35,7 @@ function handleLink(event: MouseEvent, uri: string): void {
  }
 }

-export class WebLinksAddon implements ITerminalAddon, IWebLinksApi {
+export class WebLinksAddon implements ITerminalAddon , IWebLinksApi {
  private _terminal: Terminal | undefined;
  private _linkProvider: IDisposable | undefined;

@@ -48,7 +48,7 @@ export class WebLinksAddon implements ITerminalAddon, IWebLinksApi {
  public activate(terminal: Terminal): void {
    this._terminal = terminal;
    const options = this._options as ILinkProviderOptions;
-    const regex = options.urlRegex ?? strictUrlRegex;
+    const regex = options.urlRegex || strictUrlRegex;
    this._linkProvider = this._terminal.registerLinkProvider(new WebLinkProvider(this._terminal, regex, this._handler, options));
  }

@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -7,7 +7,6 @@ import { ICellData } from 'common/Types';
 import { Terminal } from '@xterm/xterm';
 import { rgba } from 'common/Color';
 import { treatGlyphAsBackgroundColor } from 'browser/renderer/shared/RendererUtils';
-import { blockPatternCodepoints } from './customGlyphs/CustomGlyphDefinitions';

 // Work variables to avoid garbage collection
 let $fg = 0;
@@ -43,7 +42,7 @@ export class CellColorResolver {
   * Resolves colors for the cell, putting the result into the shared {@link result}. This resolves
   * overrides, inverse and selection for the cell which can then be used to feed into the renderer.
   */
-  public resolve(cell: ICellData, x: number, y: number, deviceCellWidth: number, deviceCellHeight: number): void {
+  public resolve(cell: ICellData, x: number, y: number, deviceCellWidth: number): void {
    this.result.bg = cell.bg;
    this.result.fg = cell.fg;
    this.result.ext = cell.bg & BgFlags.HAS_EXTENDED ? cell.extended.ext : 0;
@@ -64,9 +63,7 @@ export class CellColorResolver {
      const lineWidth = Math.max(1, Math.floor(this._optionService.rawOptions.fontSize * this._coreBrowserService.dpr / 15));
      $variantOffset = x * deviceCellWidth % (Math.round(lineWidth) * 2);
    }
-    if ($variantOffset === 0 && blockPatternCodepoints.has(code)) {
-      $variantOffset = ((x * deviceCellWidth) % 2) * 2 + ((y * deviceCellHeight) % 2);
-    }
+
    // Apply decorations on the bottom layer
    this._decorationService.forEachDecorationAtCell(x, y, 'bottom', d => {
      if (d.backgroundColorRGB) {
@@ -8,7 +8,6 @@ import { ITerminalOptions, Terminal } from '@xterm/xterm';
 import { ITerminal, ReadonlyColorSet } from 'browser/Types';
 import { ICharAtlasConfig, ITextureAtlas } from './Types';
 import { generateConfig, configEquals } from './CharAtlasUtils';
-import type { ILogService } from 'common/services/Services';

 interface ITextureAtlasCacheEntry {
  atlas: ITextureAtlas;
@@ -68,9 +67,8 @@ export function acquireTextureAtlas(
  }

  const core: ITerminal = (terminal as any)._core;
-  const logService = (core as any)._logService as ILogService;
  const newEntry: ITextureAtlasCacheEntry = {
-    atlas: new TextureAtlas(document, newConfig, core.unicodeService, logService),
+    atlas: new TextureAtlas(document, newConfig, core.unicodeService),
    config: newConfig,
    ownedBy: [terminal]
  };
@@ -3,7 +3,7 @@
 * @license MIT
 */

-import { toDisposable, IDisposable } from 'common/Lifecycle';
+import { toDisposable, IDisposable } from 'vs/base/common/lifecycle';

 export function observeDevicePixelDimensions(element: HTMLElement, parentWindow: Window & typeof globalThis, callback: (deviceWidth: number, deviceHeight: number) => void): IDisposable {
  // Observe any resizes to the element and extract the actual pixel size of the element if the
@@ -5,7 +5,7 @@
 import { TextureAtlas } from './TextureAtlas';
 import { IRenderDimensions } from 'browser/renderer/shared/Types';
 import { NULL_CELL_CODE } from 'common/buffer/Constants';
-import { Disposable, toDisposable } from 'common/Lifecycle';
+import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
 import { Terminal } from '@xterm/xterm';
 import { IRenderModel, IWebGL2RenderingContext, IWebGLVertexArrayObject, type IRasterizedGlyph, type ITextureAtlas } from './Types';
 import { createProgram, GLTexture, PROJECTION_MATRIX } from './WebglUtils';
@@ -7,7 +7,7 @@ import { IRenderDimensions } from 'browser/renderer/shared/Types';
 import { IThemeService } from 'browser/services/Services';
 import { ReadonlyColorSet } from 'browser/Types';
 import { Attributes, FgFlags } from 'common/buffer/Constants';
-import { Disposable, toDisposable } from 'common/Lifecycle';
+import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
 import { IColor } from 'common/Types';
 import { Terminal } from '@xterm/xterm';
 import { RENDER_MODEL_BG_OFFSET, RENDER_MODEL_FG_OFFSET, RENDER_MODEL_INDICIES_PER_CELL } from './RenderModel';
@@ -5,7 +5,7 @@

 import { IColorContrastCache } from 'browser/Types';
 import { DIM_OPACITY, TEXT_BASELINE } from './Constants';
-import { tryDrawCustomGlyph } from './customGlyphs/CustomGlyphRasterizer';
+import { loadCustomGlyphDefinitions, tryDrawCustomGlyph } from './customGlyphs/CustomGlyphRasterizer';
 import { computeNextVariantOffset, treatGlyphAsBackgroundColor, isPowerlineGlyph, isRestrictedPowerlineGlyph, throwIfFalsy } from 'browser/renderer/shared/RendererUtils';
 import { IBoundingBox, ICharAtlasConfig, IRasterizedGlyph, ITextureAtlas } from './Types';
 import { NULL_COLOR, channels, color, rgba } from 'common/Color';
@@ -14,8 +14,8 @@ import { IdleTaskQueue } from 'common/TaskQueue';
 import { IColor } from 'common/Types';
 import { AttributeData } from 'common/buffer/AttributeData';
 import { Attributes, DEFAULT_COLOR, DEFAULT_EXT, UnderlineStyle } from 'common/buffer/Constants';
-import { ILogService, IUnicodeService } from 'common/services/Services';
-import { Emitter } from 'common/Event';
+import { IUnicodeService } from 'common/services/Services';
+import { Emitter } from 'vs/base/common/event';

 /**
 * A shared object which is used to draw nothing for a particular cell.
@@ -88,8 +88,7 @@ export class TextureAtlas implements ITextureAtlas {
  constructor(
    private readonly _document: Document,
    private readonly _config: ICharAtlasConfig,
-    private readonly _unicodeService: IUnicodeService,
-    private readonly _logService: ILogService
+    private readonly _unicodeService: IUnicodeService
  ) {
    this._createNewPage();
    this._tmpCanvas = createCanvas(
@@ -101,6 +100,10 @@ export class TextureAtlas implements ITextureAtlas {
      alpha: this._config.allowTransparency,
      willReadFrequently: true
    }));
+    // Start loading custom glyph definitions asynchronously if custom glyphs are enabled
+    if (this._config.customGlyphs !== false) {
+      loadCustomGlyphDefinitions();
+    }
  }

  public dispose(): void {
@@ -120,7 +123,7 @@ export class TextureAtlas implements ITextureAtlas {

  private _doWarmUp(): void {
    // Pre-fill with ASCII 33-126, this is not urgent and done in idle callbacks
-    const queue = new IdleTaskQueue(this._logService);
+    const queue = new IdleTaskQueue();
    for (let i = 33; i < 126; i++) {
      queue.enqueue(() => {
        if (!this._cacheMap.get(i, DEFAULT_COLOR, DEFAULT_COLOR, DEFAULT_EXT)) {
@@ -177,17 +180,6 @@ export class TextureAtlas implements ITextureAtlas {

      // Gather details of the merge
      const mergingPages = pagesBySize.slice(sameSizeI, sameSizeI + 4);
-
-      // Only proceed with merge if we have exactly 4 same-sized pages. If not, we cannot
-      // effectively reduce page count and merging would cause issues.
-      if (mergingPages.length < 4 || mergingPages.some(p => p.canvas.width !== mergingPages[0].canvas.width)) {
-        const newPage = new AtlasPage(this._document, this._textureSize);
-        this._pages.push(newPage);
-        this._activePages.push(newPage);
-        this._onAddTextureAtlasCanvas.fire(newPage.canvas);
-        return newPage;
-      }
-
      const sortedMergingPagesIndexes = mergingPages.map(e => e.glyphs[0].texturePage).sort((a, b) => a > b ? 1 : -1);
      const mergedPageIndex = this.pages.length - mergingPages.length;

@@ -411,7 +403,7 @@ export class TextureAtlas implements ITextureAtlas {
    const cache = this._getContrastCache(dim);
    const adjustedColor = cache.getColor(bg, fg);
    if (adjustedColor !== undefined) {
-      return adjustedColor ?? undefined;
+      return adjustedColor || undefined;
    }

    const bgRgba = this._resolveBackgroundRgba(bgColorMode, bgColor, inverse);
@@ -526,8 +518,7 @@ export class TextureAtlas implements ITextureAtlas {
    // Draw custom characters if applicable
    let customGlyph = false;
    if (this._config.customGlyphs !== false) {
-      const variantOffset = this._workAttributeData.getUnderlineVariantOffset();
-      customGlyph = tryDrawCustomGlyph(this._tmpCtx, chars, padding, padding, this._config.deviceCellWidth, this._config.deviceCellHeight, this._config.deviceCharWidth, this._config.deviceCharHeight, this._config.fontSize, this._config.devicePixelRatio, backgroundColor.css, variantOffset);
+      customGlyph = tryDrawCustomGlyph(this._tmpCtx, chars, padding, padding, this._config.deviceCellWidth, this._config.deviceCellHeight, this._config.deviceCharWidth, this._config.deviceCharHeight, this._config.fontSize, this._config.devicePixelRatio, backgroundColor.css);
    }

    // Whether to clear pixels based on a threshold difference between the glyph color and the
@@ -7,7 +7,7 @@ import { FontWeight } from '@xterm/xterm';
 import { IColorSet } from 'browser/Types';
 import { ISelectionRenderModel } from 'browser/renderer/shared/Types';
 import { CursorInactiveStyle, CursorStyle, type IDisposable } from 'common/Types';
-import type { IEvent } from 'common/Event';
+import type { Event } from 'vs/base/common/event';

 export interface IRenderModel {
  cells: Uint32Array;
@@ -58,8 +58,8 @@ export interface ICharAtlasConfig {
 export interface ITextureAtlas extends IDisposable {
  readonly pages: { canvas: HTMLCanvasElement, version: number }[];

-  onAddTextureAtlasCanvas: IEvent<HTMLCanvasElement>;
-  onRemoveTextureAtlasCanvas: IEvent<HTMLCanvasElement>;
+  onAddTextureAtlasCanvas: Event<HTMLCanvasElement>;
+  onRemoveTextureAtlasCanvas: Event<HTMLCanvasElement>;

  /**
   * Warm up the texture atlas, adding common glyphs to avoid slowing early frame.
@@ -7,14 +7,15 @@ import type { ITerminalAddon, Terminal } from '@xterm/xterm';
 import type { IWebglAddonOptions, WebglAddon as IWebglApi } from '@xterm/addon-webgl';
 import { ICharacterJoinerService, ICharSizeService, ICoreBrowserService, IRenderService, IThemeService } from 'browser/services/Services';
 import { ITerminal } from 'browser/Types';
-import { Disposable, toDisposable } from 'common/Lifecycle';
+import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
 import { getSafariVersion, isSafari } from 'common/Platform';
-import { ICoreService, IDecorationService, IOptionsService } from 'common/services/Services';
+import { ICoreService, IDecorationService, ILogService, IOptionsService } from 'common/services/Services';
 import { IWebGL2RenderingContext } from './Types';
 import { WebglRenderer } from './WebglRenderer';
-import { Emitter, EventUtils } from 'common/Event';
+import { setTraceLogger } from 'common/services/LogService';
+import { Emitter, Event } from 'vs/base/common/event';

-export class WebglAddon extends Disposable implements ITerminalAddon, IWebglApi {
+export class WebglAddon extends Disposable implements ITerminalAddon , IWebglApi {
  private _terminal?: Terminal;
  private _renderer?: WebglRenderer;

@@ -65,8 +66,13 @@ export class WebglAddon extends Disposable implements ITerminalAddon, IWebglApi
    const charSizeService: ICharSizeService = unsafeCore._charSizeService;
    const coreBrowserService: ICoreBrowserService = unsafeCore._coreBrowserService;
    const decorationService: IDecorationService = unsafeCore._decorationService;
+    const logService: ILogService = unsafeCore._logService;
    const themeService: IThemeService = unsafeCore._themeService;

+    // Set trace logger just in case it hasn't been yet which could happen when the addon is
+    // bundled separately to the core module
+    setTraceLogger(logService);
+
    this._renderer = this._register(new WebglRenderer(
      terminal,
      characterJoinerService,
@@ -79,10 +85,10 @@ export class WebglAddon extends Disposable implements ITerminalAddon, IWebglApi
      this._customGlyphs,
      this._preserveDrawingBuffer
    ));
-    this._register(EventUtils.forward(this._renderer.onContextLoss, this._onContextLoss));
-    this._register(EventUtils.forward(this._renderer.onChangeTextureAtlas, this._onChangeTextureAtlas));
-    this._register(EventUtils.forward(this._renderer.onAddTextureAtlasCanvas, this._onAddTextureAtlasCanvas));
-    this._register(EventUtils.forward(this._renderer.onRemoveTextureAtlasCanvas, this._onRemoveTextureAtlasCanvas));
+    this._register(Event.forward(this._renderer.onContextLoss, this._onContextLoss));
+    this._register(Event.forward(this._renderer.onChangeTextureAtlas, this._onChangeTextureAtlas));
+    this._register(Event.forward(this._renderer.onAddTextureAtlasCanvas, this._onAddTextureAtlasCanvas));
+    this._register(Event.forward(this._renderer.onRemoveTextureAtlasCanvas, this._onRemoveTextureAtlasCanvas));
    renderService.setRenderer(this._renderer);

    this._register(toDisposable(() => {
@@ -13,8 +13,7 @@ import { ICharSizeService, ICharacterJoinerService, ICoreBrowserService, IThemeS
 import { CharData, IBufferLine, ICellData } from 'common/Types';
 import { AttributeData } from 'common/buffer/AttributeData';
 import { CellData } from 'common/buffer/CellData';
-import { Attributes, Content, FgFlags, NULL_CELL_CHAR, NULL_CELL_CODE } from 'common/buffer/Constants';
-import { TextBlinkStateManager } from 'browser/renderer/shared/TextBlinkStateManager';
+import { Attributes, Content, NULL_CELL_CHAR, NULL_CELL_CODE } from 'common/buffer/Constants';
 import { ICoreService, IDecorationService, IOptionsService } from 'common/services/Services';
 import { Terminal } from '@xterm/xterm';
 import { GlyphRenderer } from './GlyphRenderer';
@@ -23,15 +22,14 @@ import { COMBINED_CHAR_BIT_MASK, RENDER_MODEL_BG_OFFSET, RENDER_MODEL_EXT_OFFSET
 import { IWebGL2RenderingContext, type ITextureAtlas } from './Types';
 import { LinkRenderLayer } from './renderLayer/LinkRenderLayer';
 import { IRenderLayer } from './renderLayer/Types';
-import { Emitter, EventUtils } from 'common/Event';
-import { addDisposableListener } from 'browser/Dom';
-import { combinedDisposable, Disposable, MutableDisposable, toDisposable } from 'common/Lifecycle';
+import { Emitter, Event } from 'vs/base/common/event';
+import { addDisposableListener } from 'vs/base/browser/dom';
+import { combinedDisposable, Disposable, MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
 import { createRenderDimensions } from 'browser/renderer/shared/RendererUtils';

 export class WebglRenderer extends Disposable implements IRenderer {
  private _renderLayers: IRenderLayer[];
  private _cursorBlinkStateManager: MutableDisposable<CursorBlinkStateManager> = new MutableDisposable();
-  private _textBlinkStateManager: TextBlinkStateManager;
  private _charAtlasDisposable = this._register(new MutableDisposable());
  private _charAtlas: ITextureAtlas | undefined;
  private _devicePixelRatio: number;
@@ -39,9 +37,8 @@ export class WebglRenderer extends Disposable implements IRenderer {
  private _observerDisposable = this._register(new MutableDisposable());

  private _model: RenderModel = new RenderModel();
-  private _rowHasBlinkingCells: boolean[] = [];
-  private _rowHasBlinkingCellsCount: number = 0;
  private _workCell: ICellData = new CellData();
+  private _workCell2: ICellData = new CellData();
  private _cellColorResolver: CellColorResolver;

  private _canvas: HTMLCanvasElement;
@@ -108,12 +105,6 @@ export class WebglRenderer extends Disposable implements IRenderer {
    this._updateDimensions();
    this._updateCursorBlink();
    this._register(_optionsService.onOptionChange(() => this._handleOptionsChanged()));
-    this._textBlinkStateManager = this._register(new TextBlinkStateManager(
-      () => this._requestRedrawViewport(),
-      this._coreBrowserService,
-      this._optionsService
-    ));
-    this._resetBlinkingRowState();

    this._deviceMaxTextureSize = this._gl.getParameter(this._gl.MAX_TEXTURE_SIZE);

@@ -187,7 +178,6 @@ export class WebglRenderer extends Disposable implements IRenderer {
    this._updateDimensions();

    this._model.resize(this._terminal.cols, this._terminal.rows);
-    this._resetBlinkingRowState();

    // Resize all render layers
    for (const l of this._renderLayers) {
@@ -241,10 +231,6 @@ export class WebglRenderer extends Disposable implements IRenderer {
    this._requestRedrawViewport();
  }

-  public handleViewportVisibilityChange(isVisible: boolean): void {
-    this._textBlinkStateManager.setViewportVisible(isVisible);
-  }
-
  public handleSelectionChanged(start: [number, number] | undefined, end: [number, number] | undefined, columnSelectMode: boolean): void {
    for (const l of this._renderLayers) {
      l.handleSelectionChanged(this._terminal, start, end, columnSelectMode);
@@ -304,8 +290,8 @@ export class WebglRenderer extends Disposable implements IRenderer {
    if (this._charAtlas !== atlas) {
      this._onChangeTextureAtlas.fire(atlas.pages[0].canvas);
      this._charAtlasDisposable.value = combinedDisposable(
-        EventUtils.forward(atlas.onAddTextureAtlasCanvas, this._onAddTextureAtlasCanvas),
-        EventUtils.forward(atlas.onRemoveTextureAtlasCanvas, this._onRemoveTextureAtlasCanvas)
+        Event.forward(atlas.onAddTextureAtlasCanvas, this._onAddTextureAtlasCanvas),
+        Event.forward(atlas.onRemoveTextureAtlasCanvas, this._onRemoveTextureAtlasCanvas)
      );
    }
    this._charAtlas = atlas;
@@ -337,9 +323,6 @@ export class WebglRenderer extends Disposable implements IRenderer {
      l.reset(this._terminal);
    }

-    this._resetBlinkingRowState();
-    this._textBlinkStateManager.setNeedsBlinkInViewport(false);
-
    this._cursorBlinkStateManager.value?.restartBlinkAnimation();
    this._updateCursorBlink();
  }
@@ -437,7 +420,6 @@ export class WebglRenderer extends Disposable implements IRenderer {
    for (y = start; y <= end; y++) {
      row = y + terminal.buffer.ydisp;
      line = terminal.buffer.lines.get(row)!;
-      let rowHasBlinkingCells = false;
      this._model.lineLengths[y] = 0;
      isCursorRow = cursorY === row;
      skipJoinedCheckUntilX = 0;
@@ -495,12 +477,8 @@ export class WebglRenderer extends Disposable implements IRenderer {
        code = cell.getCode();
        i = ((y * terminal.cols) + x) * RENDER_MODEL_INDICIES_PER_CELL;

-        if (!rowHasBlinkingCells && cell.isBlink()) {
-          rowHasBlinkingCells = true;
-        }
-
        // Load colors/resolve overrides into work colors
-        this._cellColorResolver.resolve(cell, x, row, this.dimensions.device.cell.width, this.dimensions.device.cell.height);
+        this._cellColorResolver.resolve(cell, x, row, this.dimensions.device.cell.width);

        // Override colors for cursor cell
        if (isCursorVisible && row === cursorY) {
@@ -528,10 +506,6 @@ export class WebglRenderer extends Disposable implements IRenderer {
          }
        }

-        if (this._textBlinkStateManager.isEnabled && !this._textBlinkStateManager.isBlinkOn && cell.isBlink()) {
-          this._cellColorResolver.result.fg |= FgFlags.INVISIBLE;
-        }
-
        if (code !== NULL_CELL_CODE) {
          this._model.lineLengths[y] = x + 1;
        }
@@ -578,31 +552,11 @@ export class WebglRenderer extends Disposable implements IRenderer {
          x--; // Go back to the previous update cell for next iteration
        }
      }
-      this._setRowBlinkState(y, rowHasBlinkingCells);
    }
    if (modelUpdated) {
      this._rectangleRenderer.value!.updateBackgrounds(this._model);
    }
    this._rectangleRenderer.value!.updateCursor(this._model);
-    this._updateTextBlinkState();
-  }
-
-  private _resetBlinkingRowState(): void {
-    this._rowHasBlinkingCells = new Array(this._terminal.rows).fill(false);
-    this._rowHasBlinkingCellsCount = 0;
-  }
-
-  private _setRowBlinkState(row: number, hasBlinkingCells: boolean): void {
-    const previous = this._rowHasBlinkingCells[row];
-    if (previous === hasBlinkingCells) {
-      return;
-    }
-    this._rowHasBlinkingCells[row] = hasBlinkingCells;
-    this._rowHasBlinkingCellsCount += hasBlinkingCells ? 1 : -1;
-  }
-
-  private _updateTextBlinkState(): void {
-    this._textBlinkStateManager.setNeedsBlinkInViewport(this._rowHasBlinkingCellsCount > 0);
  }

  /**
@@ -644,8 +644,8 @@ export const customGlyphDefinitions: { [index: string]: CustomGlyphCharacterDefi
  ] },

  // Diagonal fill characters (1FB98-1FB99)
-  '\u{1FB98}': { type: CustomGlyphDefinitionType.PATH_FUNCTION, data: 'M-0.25,-0.25 L1.25,1.25 M-0.25,0 L1,1.25 M-0.25,0.25 L0.75,1.25 M-0.25,0.5 L0.5,1.25 M0,-0.25 L1.25,1 M0.25,-0.25 L1.25,0.75 M0.5,-0.25 L1.25,0.5 M-0.25,0.75 L0.25,1.25 M0.75,-0.25 L1.25,0.25', strokeWidth: 1 }, // UPPER LEFT TO LOWER RIGHT FILL
-  '\u{1FB99}': { type: CustomGlyphDefinitionType.PATH_FUNCTION, data: 'M-0.25,0.5 L0.5,-0.25 M-0.25,0.75 L0.75,-0.25 M-0.25,1 L1,-0.25 M-0.25,1.25 L1.25,-0.25 M0,1.25 L1.25,0 M0.25,1.25 L1.25,0.25 M0.5,1.25 L1.25,0.5 M-0.25,0.25 L0.25,-0.25 M0.75,1.25 L1.25,0.75', strokeWidth: 1 }, // UPPER RIGHT TO LOWER LEFT FILL
+  '\u{1FB98}': { type: CustomGlyphDefinitionType.PATH_FUNCTION, data: 'M0,0 L1,1 M0,.25 L.75,1 M0,.5 L.5,1 M0,.75 L.25,1 M.25,0 L1,.75 M.5,0 L1,.5 M.75,0 L1,.25', strokeWidth: 1 }, // UPPER LEFT TO LOWER RIGHT FILL
+  '\u{1FB99}': { type: CustomGlyphDefinitionType.PATH_FUNCTION, data: 'M0,.25 L.25,0 M0,.5 L.5,0 M0,.75 L.75,0 M0,1 L1,0 M.25,1 L1,.25 M.5,1 L1,.5 M.75,1 L1,.75', strokeWidth: 1 }, // UPPER RIGHT TO LOWER LEFT FILL

  // Smooth mosaic terminal graphic characters (1FB9A-1FB9B)
  '\u{1FB9A}': { type: CustomGlyphDefinitionType.VECTOR_SHAPE, data: { d: 'M0,0 L.5,.5 L0,1 L1,1 L.5,.5 L1,0', type: CustomGlyphVectorType.FILL } }, // UPPER AND LOWER TRIANGULAR HALF BLOCK
@@ -820,27 +820,6 @@ export const customGlyphDefinitions: { [index: string]: CustomGlyphCharacterDefi
  // #endregion
 };

-export const blockPatternCodepoints = new Set<number>([
-  // Shade characters (2591-2593)
-  0x2591,
-  0x2592,
-  0x2593,
-  // Rectangular shade characters (1FB8C-1FB94)
-  0x1FB8C,
-  0x1FB8D,
-  0x1FB8E,
-  0x1FB8F,
-  0x1FB90,
-  0x1FB91,
-  0x1FB92,
-  0x1FB94,
-  // Triangular shade characters (1FB9C-1FB9F)
-  0x1FB9C,
-  0x1FB9D,
-  0x1FB9E,
-  0x1FB9F
-]);
-
 /**
 * Generates a drawing function for sextant characters. Sextants are a 2x3 grid where each cell
 * can be on or off.
@@ -4,8 +4,38 @@
 */

 import { throwIfFalsy } from 'browser/renderer/shared/RendererUtils';
-import { customGlyphDefinitions } from './CustomGlyphDefinitions';
-import { CustomGlyphDefinitionType, CustomGlyphScaleType, CustomGlyphVectorType, type CustomGlyphDefinitionPart, type CustomGlyphPathDrawFunctionDefinition, type CustomGlyphPatternDefinition, type ICustomGlyphSolidOctantBlockVector, type ICustomGlyphVectorShape } from './Types';
+import { CustomGlyphDefinitionType, CustomGlyphScaleType, CustomGlyphVectorType, type CustomGlyphCharacterDefinition, type CustomGlyphDefinitionPart, type CustomGlyphPathDrawFunctionDefinition, type CustomGlyphPatternDefinition, type ICustomGlyphSolidOctantBlockVector, type ICustomGlyphVectorShape } from './Types';
+
+/**
+ * Cached custom glyph definitions. This is loaded dynamically to support code splitting.
+ */
+let customGlyphDefinitions: { [index: string]: CustomGlyphCharacterDefinition | undefined } | undefined;
+
+/**
+ * Promise that resolves when custom glyph definitions are loaded.
+ */
+let loadingPromise: Promise<void> | undefined;
+
+/**
+ * Begins loading the custom glyph definitions. This should be called as early as possible
+ * to ensure the definitions are ready when needed.
+ * @returns A promise that resolves when the definitions are loaded.
+ */
+export function loadCustomGlyphDefinitions(): Promise<void> {
+  if (customGlyphDefinitions) {
+    return Promise.resolve();
+  }
+  if (!loadingPromise) {
+    loadingPromise = import('./CustomGlyphDefinitions').then(module => {
+      customGlyphDefinitions = module.customGlyphDefinitions;
+    }).catch(err => {
+      // Reset the loading promise on failure to allow retry
+      loadingPromise = undefined;
+      throw err;
+    });
+  }
+  return loadingPromise;
+}

 /**
 * Try drawing a custom block element or box drawing character, returning whether it was
@@ -22,15 +52,19 @@ export function tryDrawCustomGlyph(
  deviceCharHeight: number,
  fontSize: number,
  devicePixelRatio: number,
-  backgroundColor?: string,
-  variantOffset: number = 0
+  backgroundColor?: string
 ): boolean {
+  // If definitions are not loaded yet, return false to fall back to font rendering
+  if (!customGlyphDefinitions) {
+    return false;
+  }
+
  const unifiedCharDefinition = customGlyphDefinitions[c];
  if (unifiedCharDefinition) {
    // Normalize to array for uniform handling
    const parts = Array.isArray(unifiedCharDefinition) ? unifiedCharDefinition : [unifiedCharDefinition];
    for (const part of parts) {
-      drawDefinitionPart(ctx, part, xOffset, yOffset, deviceCellWidth, deviceCellHeight, deviceCharWidth, deviceCharHeight, fontSize, devicePixelRatio, backgroundColor, variantOffset);
+      drawDefinitionPart(ctx, part, xOffset, yOffset, deviceCellWidth, deviceCellHeight, deviceCharWidth, deviceCharHeight, fontSize, devicePixelRatio, backgroundColor);
    }
    return true;
  }
@@ -49,8 +83,7 @@ function drawDefinitionPart(
  deviceCharHeight: number,
  fontSize: number,
  devicePixelRatio: number,
-  backgroundColor?: string,
-  variantOffset: number = 0
+  backgroundColor?: string
 ): void {
  // Handle scaleType - adjust dimensions and offset when scaling to character area
  let drawWidth = deviceCellWidth;
@@ -76,7 +109,7 @@ function drawDefinitionPart(
      drawBlockVectorChar(ctx, part.data, drawXOffset, drawYOffset, drawWidth, drawHeight);
      break;
    case CustomGlyphDefinitionType.BLOCK_PATTERN:
-      drawPatternChar(ctx, part.data, drawXOffset, drawYOffset, drawWidth, drawHeight, variantOffset);
+      drawPatternChar(ctx, part.data, drawXOffset, drawYOffset, drawWidth, drawHeight);
      break;
    case CustomGlyphDefinitionType.PATH_FUNCTION:
      drawPathFunctionCharacter(ctx, part.data, drawXOffset, drawYOffset, drawWidth, drawHeight, devicePixelRatio, part.strokeWidth);
@@ -439,8 +472,7 @@ function drawPatternChar(
  xOffset: number,
  yOffset: number,
  deviceCellWidth: number,
-  deviceCellHeight: number,
-  variantOffset: number = 0
+  deviceCellHeight: number
 ): void {
  let patternSet = cachedPatterns.get(charDefinition);
  if (!patternSet) {
@@ -489,15 +521,6 @@ function drawPatternChar(
    pattern = throwIfFalsy(ctx.createPattern(tmpCanvas, null));
    patternSet.set(fillStyle, pattern);
  }
-  // Apply pattern offset to ensure seamless tiling across cells when cell dimensions are odd.
-  // variantOffset encodes: bit 1 = x pixel shift, bit 0 = y pixel shift.
-  const dx = (variantOffset >> 1) & 1;
-  const dy = variantOffset & 1;
-  if (dx !== 0 || dy !== 0) {
-    pattern.setTransform(new DOMMatrix().translateSelf(-dx, -dy));
-  } else {
-    pattern.setTransform(new DOMMatrix());
-  }
  ctx.fillStyle = pattern;
  ctx.fillRect(xOffset, yOffset, deviceCellWidth, deviceCellHeight);
 }
@@ -512,11 +535,6 @@ function drawPathFunctionCharacter(
  devicePixelRatio: number,
  strokeWidth?: number
 ): void {
-  ctx.save();
-  ctx.beginPath();
-  ctx.rect(xOffset, yOffset, deviceCellWidth, deviceCellHeight);
-  ctx.clip();
-
  ctx.beginPath();
  let actualInstructions: string;
  if (typeof charDefinition === 'function') {
@@ -543,7 +561,7 @@ function drawPathFunctionCharacter(
    if (!args[0] || !args[1]) {
      continue;
    }
-    f(ctx, translateArgs(args, deviceCellWidth, deviceCellHeight, xOffset, yOffset, true, devicePixelRatio, 0, 0, false), state);
+    f(ctx, translateArgs(args, deviceCellWidth, deviceCellHeight, xOffset, yOffset, true, devicePixelRatio), state);
    state.lastCommand = type;
  }
  if (strokeWidth !== undefined) {
@@ -554,7 +572,6 @@ function drawPathFunctionCharacter(
    ctx.fill();
  }
  ctx.closePath();
-  ctx.restore();
 }

 /**
@@ -703,7 +720,7 @@ const svgToCanvasInstructionMap: { [index: string]: (ctx: CanvasRenderingContext
  }
 };

-function translateArgs(args: string[], cellWidth: number, cellHeight: number, xOffset: number, yOffset: number, doClamp: boolean, devicePixelRatio: number, leftPadding: number = 0, rightPadding: number = 0, clampToCell: boolean = true): number[] {
+function translateArgs(args: string[], cellWidth: number, cellHeight: number, xOffset: number, yOffset: number, doClamp: boolean, devicePixelRatio: number, leftPadding: number = 0, rightPadding: number = 0): number[] {
  const result = args.map(e => parseFloat(e) || parseInt(e));

  if (result.length < 2) {
@@ -713,11 +730,10 @@ function translateArgs(args: string[], cellWidth: number, cellHeight: number, xO
  for (let x = 0; x < result.length; x += 2) {
    // Translate from 0-1 to 0-cellWidth
    result[x] *= cellWidth - (leftPadding * devicePixelRatio) - (rightPadding * devicePixelRatio);
-    // Round to the nearest 0.5 to ensure a crisp line at 100% devicePixelRatio, and optionally
-    // clamp to the cell bounds.
+    // Ensure coordinate doesn't escape cell bounds and round to the nearest 0.5 to ensure a crisp
+    // line at 100% devicePixelRatio
    if (doClamp && result[x] !== 0) {
-      const rounded = Math.round(result[x] + 0.5) - 0.5;
-      result[x] = clampToCell ? clamp(rounded, cellWidth, 0) : rounded;
+      result[x] = clamp(Math.round(result[x] + 0.5) - 0.5, cellWidth, 0);
    }
    // Apply the cell's offset (ie. x*cellWidth)
    result[x] += xOffset + (leftPadding * devicePixelRatio);
@@ -726,11 +742,10 @@ function translateArgs(args: string[], cellWidth: number, cellHeight: number, xO
  for (let y = 1; y < result.length; y += 2) {
    // Translate from 0-1 to 0-cellHeight
    result[y] *= cellHeight;
-    // Round to the nearest 0.5 to ensure a crisp line at 100% devicePixelRatio, and optionally
-    // clamp to the cell bounds.
+    // Ensure coordinate doesn't escape cell bounds and round to the nearest 0.5 to ensure a crisp
+    // line at 100% devicePixelRatio
    if (doClamp && result[y] !== 0) {
-      const rounded = Math.round(result[y] + 0.5) - 0.5;
-      result[y] = clampToCell ? clamp(rounded, cellHeight, 0) : rounded;
+      result[y] = clamp(Math.round(result[y] + 0.5) - 0.5, cellHeight, 0);
    }
    // Apply the cell's offset (ie. x*cellHeight)
    result[y] += yOffset;
@@ -7,7 +7,7 @@ import { ReadonlyColorSet } from 'browser/Types';
 import { acquireTextureAtlas } from '../CharAtlasCache';
 import { IRenderDimensions } from 'browser/renderer/shared/Types';
 import { ICoreBrowserService, IThemeService } from 'browser/services/Services';
-import { Disposable, toDisposable } from 'common/Lifecycle';
+import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
 import { CellData } from 'common/buffer/CellData';
 import { IOptionsService } from 'common/services/Services';
 import { Terminal } from '@xterm/xterm';
@@ -18,6 +18,9 @@
      "browser/*": [
        "../../../src/browser/*"
      ],
+      "vs/*": [
+        "../../../src/vs/*"
+      ],
      "@xterm/addon-webgl": [
        "../typings/addon-webgl.d.ts"
      ]
@@ -39,6 +42,9 @@
    },
    {
      "path": "../../../src/browser"
+    },
+    {
+      "path": "../../../src/vs"
    }
  ]
 }
@@ -5,9 +5,10 @@ const config: PlaywrightTestConfig = {
  timeout: 10000,
  projects: [
    {
-      name: 'Chromium',
+      name: 'ChromeStable',
      use: {
-        browserName: 'chromium'
+        browserName: 'chromium',
+        channel: 'chrome'
      }
    },
    {
@@ -1,42 +0,0 @@
-/**
- * Copyright (c) 2026 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { spawnSync } from 'child_process';
-import { copyFileSync, mkdirSync, renameSync } from 'fs';
-import path from 'path';
-import process from 'process';
-import { fileURLToPath } from 'url';
-
-const repoRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..');
-const ghosttyDir = path.join(repoRoot, 'vendor', 'ghostty');
-const wasmOutDir = path.join(repoRoot, 'vendor', 'ghostty-wasm');
-const wasmBinDir = path.join(wasmOutDir, 'bin');
-const wasmFile = path.join(wasmOutDir, 'ghostty-vt.wasm');
-const wasmBinFile = path.join(wasmBinDir, 'ghostty-vt.wasm');
-
-mkdirSync(wasmOutDir, { recursive: true });
-
-const result = spawnSync('zig', [
-  'build',
-  'lib-vt',
-  '-Dtarget=wasm32-freestanding',
-  '-Doptimize=ReleaseSmall',
-  '-p',
-  path.relative(ghosttyDir, wasmOutDir)
-], {
-  cwd: ghosttyDir,
-  stdio: 'inherit',
-  shell: true
-});
-
-if (result.status !== 0) {
-  process.exit(result.status ?? 1);
-}
-
-try {
-  renameSync(wasmBinFile, wasmFile);
-} catch {
-  copyFileSync(wasmBinFile, wasmFile);
-}
@@ -26,7 +26,10 @@ const commonOptions = {
  target: 'es2021',
  sourcemap: true,
  treeShaking: true,
+  splitting: true,
+  chunkNames: 'chunks/[name]-[hash]',
  logLevel: 'warning',
+  outExtension: { '.js': '.mjs' },
 };

 /** @type {esbuild.BuildOptions} */
@@ -103,7 +106,8 @@ if (config.addon) {
  bundleConfig = {
    ...bundleConfig,
    entryPoints: [`addons/addon-${config.addon}/src/${getAddonEntryPoint(config.addon)}.ts`],
-    outfile: `addons/addon-${config.addon}/lib/addon-${config.addon}.mjs`,
+    outdir: `addons/addon-${config.addon}/lib`,
+    entryNames: `addon-${config.addon}`,
  };
  outConfig = {
    ...outConfig,
@@ -127,9 +131,9 @@ if (config.addon) {
 } else if (config.isDemoClient) {
  bundleConfig = {
    ...bundleConfig,
-    sourcemap: false,
    entryPoints: [`demo/client/client.ts`],
-    outfile: 'demo/dist/client-bundle.js',
+    outdir: 'demo/dist',
+    entryNames: 'client-bundle',
    external: ['util', 'os', 'fs', 'path', 'stream', 'Terminal'],
    alias: {
      // Library ESM imports
@@ -165,6 +169,10 @@ if (config.addon) {
    format: 'cjs',
    platform: 'node',
    external: ['node-pty'],
+    // Splitting is not compatible with cjs format
+    splitting: false,
+    // Override the .mjs extension from commonOptions
+    outExtension: {},
  }
  skipOut = true;
  skipOutTest = true;
@@ -172,7 +180,8 @@ if (config.addon) {
  bundleConfig = {
    ...bundleConfig,
    entryPoints: [`src/headless/public/Terminal.ts`],
-    outfile: `headless/lib-headless/xterm-headless.mjs`
+    outdir: `headless/lib-headless`,
+    entryNames: 'xterm-headless',
  };
  outConfig = {
    ...outConfig,
@@ -184,14 +193,17 @@ if (config.addon) {
  bundleConfig = {
    ...bundleConfig,
    entryPoints: [`src/browser/public/Terminal.ts`],
-    outfile: `lib/xterm.mjs`
+    outdir: `lib`,
+    entryNames: 'xterm',
  };
  outConfig = {
    ...outConfig,
    entryPoints: [
      'src/browser/**/*.ts',
      'src/common/**/*.ts',
-      'src/headless/**/*.ts'
+      'src/headless/**/*.ts',
+      'src/vs/base/**/*.ts',
+      'src/vs/patches/**/*.ts'
    ],
    outdir: 'out-esbuild/'
  };
@@ -6,9 +6,6 @@
 const cp = require('child_process');
 const path = require('path');

-globalThis.require = require;
-globalThis.XTERM_GHOSTTY_WASM_URL = path.resolve(__dirname, '../vendor/ghostty-wasm/ghostty-vt.wasm');
-
 const COVERAGE_LINES_THRESHOLD = 40;

 // Add `out` to the NODE_PATH so absolute paths can be resolved.
@@ -218,30 +218,17 @@
 /* Derived from vs/base/browser/ui/scrollbar/media/scrollbar.css */

 /* xterm.js customization: Override xterm's cursor style */
-.xterm .xterm-scrollable-element > .xterm-scrollbar {
+.xterm .xterm-scrollable-element > .scrollbar {
    cursor: default;
 }

 /* Arrows */
-
-.xterm .xterm-scrollable-element > .xterm-scrollbar > .xterm-scra {
+.xterm .xterm-scrollable-element > .scrollbar > .scra {
 	cursor: pointer;
-    background-color: var(--vscode-scrollbarSliderBackground, rgba(100, 100, 100, 0.4));
-    mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 11 11'><path d='M2.5 8.5 L5.5 2.5 L8.5 8.5 Z' fill='black'/></svg>");
-    -webkit-mask-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 11 11'><path d='M2.5 8.5 L5.5 2.5 L8.5 8.5 Z' fill='black'/></svg>");
-    mask-repeat: no-repeat;
-    -webkit-mask-repeat: no-repeat;
-    mask-position: center center;
-    -webkit-mask-position: center center;
-    mask-size: 100% 100%;
-    -webkit-mask-size: 100% 100%;
+	font-size: 11px !important;
 }

-.xterm .xterm-scrollable-element > .xterm-scrollbar > .xterm-scra.xterm-arrow-down {
-    transform: rotate(180deg);
-}
-
-.xterm .xterm-scrollable-element > .xterm-visible {
+.xterm .xterm-scrollable-element > .visible {
 	opacity: 1;

 	/* Background rule added for IE9 - to allow clicks on dom node */
@@ -251,20 +238,20 @@
 	/* In front of peek view */
 	z-index: 11;
 }
-.xterm .xterm-scrollable-element > .xterm-invisible {
+.xterm .xterm-scrollable-element > .invisible {
 	opacity: 0;
 	pointer-events: none;
 }
-.xterm .xterm-scrollable-element > .xterm-invisible.xterm-fade {
+.xterm .xterm-scrollable-element > .invisible.fade {
 	transition: opacity 800ms linear;
 }

 /* Scrollable Content Inset Shadow */
-.xterm .xterm-scrollable-element > .xterm-shadow {
+.xterm .xterm-scrollable-element > .shadow {
 	position: absolute;
 	display: none;
 }
-.xterm .xterm-scrollable-element > .xterm-shadow.xterm-shadow-top {
+.xterm .xterm-scrollable-element > .shadow.top {
 	display: block;
 	top: 0;
 	left: 3px;
@@ -272,7 +259,7 @@
 	width: 100%;
 	box-shadow: var(--vscode-scrollbar-shadow, #000) 0 6px 6px -6px inset;
 }
-.xterm .xterm-scrollable-element > .xterm-shadow.xterm-shadow-left {
+.xterm .xterm-scrollable-element > .shadow.left {
 	display: block;
 	top: 3px;
 	left: 0;
@@ -280,13 +267,13 @@
 	width: 3px;
 	box-shadow: var(--vscode-scrollbar-shadow, #000) 6px 0 6px -6px inset;
 }
-.xterm .xterm-scrollable-element > .xterm-shadow.xterm-shadow-top-left-corner {
+.xterm .xterm-scrollable-element > .shadow.top-left-corner {
 	display: block;
 	top: 0;
 	left: 0;
 	height: 3px;
 	width: 3px;
 }
-.xterm .xterm-scrollable-element > .xterm-shadow.xterm-shadow-top.xterm-shadow-left {
+.xterm .xterm-scrollable-element > .shadow.top.left {
 	box-shadow: var(--vscode-scrollbar-shadow, #000) 6px 0 6px -6px inset;
 }
@@ -16,12 +16,9 @@ if ('WebAssembly' in window) {
 import { Terminal, ITerminalOptions, type ITheme } from '@xterm/xterm';
 import { AttachAddon } from '@xterm/addon-attach';
 import { AddonImageWindow } from './components/window/addonImageWindow';
-import { AddonLigaturesWindow } from './components/window/addonLigaturesWindow';
-import { AddonProgressWindow } from './components/window/addonProgressWindow';
 import { AddonSearchWindow } from './components/window/addonSearchWindow';
 import { AddonSerializeWindow } from './components/window/addonSerializeWindow';
 import { AddonWebFontsWindow } from './components/window/addonWebFontsWindow';
-import { AddonWebLinksWindow } from './components/window/addonWebLinksWindow';
 import { AddonsWindow } from './components/window/addonsWindow';
 import { CellInspectorWindow } from './components/window/cellInspectorWindow';
 import { ControlBar } from './components/controlBar';
@@ -61,11 +58,11 @@ export interface IWindowWithTerminal extends Window {
 }
 declare let window: IWindowWithTerminal;

-let term: Terminal | null;
-let protocol: string;
-let socketURL: string;
-let socket: WebSocket | null;
-let pid: string;
+let term;
+let protocol;
+let socketURL;
+let socket;
+let pid;
 let controlBar: ControlBar;
 let addonsWindow: AddonsWindow;
 let addonSearchWindow: AddonSearchWindow;
@@ -76,7 +73,7 @@ const addons: AddonCollection = {
  attach: { name: 'attach', ctor: AttachAddon, canChange: false },
  clipboard: { name: 'clipboard', ctor: ClipboardAddon, canChange: true },
  fit: { name: 'fit', ctor: FitAddon, canChange: false },
-  image: { name: 'image', ctor: ImageAddon!, canChange: true },
+  image: { name: 'image', ctor: ImageAddon, canChange: true },
  progress: { name: 'progress', ctor: ProgressAddon, canChange: true },
  search: { name: 'search', ctor: SearchAddon, canChange: true },
  serialize: { name: 'serialize', ctor: SerializeAddon, canChange: true },
@@ -119,8 +116,8 @@ const xtermjsTheme = {
  brightWhite: '#FFFFFF'
 } satisfies ITheme;
 function setPadding(): void {
-  term!.element!.style.padding = parseInt(paddingElement.value, 10).toString() + 'px';
-  addons.fit.instance!.fit();
+  term.element.style.padding = parseInt(paddingElement.value, 10).toString() + 'px';
+  addons.fit.instance.fit();
 }

 function getSearchOptions(): ISearchOptions {
@@ -144,7 +141,7 @@ const disposeRecreateButtonHandler: () => void = () => {
  if (term) {
    term.dispose();
    term = null;
-    (window as any).term = null;
+    window.term = null;
    socket = null;
    addons.attach.instance = undefined;
    addons.clipboard.instance = undefined;
@@ -157,10 +154,10 @@ const disposeRecreateButtonHandler: () => void = () => {
    addons.ligatures.instance = undefined;
    addons.webLinks.instance = undefined;
    addons.webgl.instance = undefined;
-    document.getElementById('dispose')!.innerHTML = 'Recreate Terminal';
+    document.getElementById('dispose').innerHTML = 'Recreate Terminal';
  } else {
    createTerminal();
-    document.getElementById('dispose')!.innerHTML = 'Dispose terminal';
+    document.getElementById('dispose').innerHTML = 'Dispose terminal';
  }
 };

@@ -168,7 +165,7 @@ const createNewWindowButtonHandler: () => void = () => {
  if (term) {
    disposeRecreateButtonHandler();
  }
-  const win = window.open()!;
+  const win = window.open();
  terminalContainer = win.document.createElement('div');
  terminalContainer.id = 'terminal-container';
  win.document.body.appendChild(terminalContainer);
@@ -210,20 +207,17 @@ if (document.location.pathname === '/test') {
 } else {
  const typedTerm = createTerminal();

-  controlBar = new ControlBar(document.getElementById('sidebar')!, document.querySelector('.banner-tabs')!, []);
+  controlBar = new ControlBar(document.getElementById('sidebar'), document.querySelector('.banner-tabs'), []);
  optionsWindow = controlBar.registerWindow(new OptionsWindow(typedTerm, addons, { updateTerminalSize, updateTerminalContainerBackground }));
  const styleWindow = controlBar.registerWindow(new StyleWindow(typedTerm, addons));
  controlBar.registerWindow(new CellInspectorWindow(typedTerm, addons));
  controlBar.registerWindow(new VtWindow(typedTerm, addons));
  addonsWindow = controlBar.registerWindow(new AddonsWindow(typedTerm, addons));
-  controlBar.registerWindow(new AddonImageWindow(typedTerm, addons), { afterId: 'addons', hidden: true, italics: true });
-  controlBar.registerWindow(new AddonLigaturesWindow(typedTerm, addons), { afterId: 'addon-image', hidden: true, italics: true });
-  controlBar.registerWindow(new AddonProgressWindow(typedTerm, addons), { afterId: 'addon-ligatures', hidden: true, italics: true });
-  addonSearchWindow = controlBar.registerWindow(new AddonSearchWindow(typedTerm, addons), { afterId: 'addon-progress', hidden: true, italics: true });
+  addonSearchWindow = controlBar.registerWindow(new AddonSearchWindow(typedTerm, addons), { afterId: 'addons', hidden: true, italics: true });
  controlBar.registerWindow(new AddonSerializeWindow(typedTerm, addons), { afterId: 'addon-search', hidden: true, italics: true });
-  controlBar.registerWindow(new AddonWebFontsWindow(typedTerm, addons), { afterId: 'addon-serialize', hidden: true, italics: true });
-  controlBar.registerWindow(new AddonWebLinksWindow(typedTerm, addons), { afterId: 'addon-web-fonts', hidden: true, italics: true });
-  addonWebglWindow = controlBar.registerWindow(new WebglWindow(typedTerm, addons), { afterId: 'addon-web-links', hidden: true, italics: true });
+  controlBar.registerWindow(new AddonImageWindow(typedTerm, addons), { afterId: 'addon-serialize', hidden: true, italics: true });
+  controlBar.registerWindow(new AddonWebFontsWindow(typedTerm, addons), { afterId: 'addon-image', hidden: true, italics: true });
+  addonWebglWindow = controlBar.registerWindow(new WebglWindow(typedTerm, addons), { afterId: 'addon-web-fonts', hidden: true, italics: true });
  controlBar.registerWindow(new TestWindow(typedTerm, addons, { disposeRecreateButtonHandler, createNewWindowButtonHandler }), { afterId: 'options' });
  actionElements = {
    findNext: addonSearchWindow.findNextInput,
@@ -235,56 +229,52 @@ if (document.location.pathname === '/test') {
  // TODO: Most of below should be encapsulated within windows
  paddingElement = styleWindow.paddingElement;

-  controlBar.setTabVisible('addon-image', !!addons.image.instance);
-  controlBar.setTabVisible('addon-ligatures', !!addons.ligatures.instance);
-  controlBar.setTabVisible('addon-progress', !!addons.progress.instance);
+  controlBar.setTabVisible('addon-webgl', true);
  controlBar.setTabVisible('addon-search', true);
  controlBar.setTabVisible('addon-serialize', true);
+  controlBar.setTabVisible('addon-image', true);
  controlBar.setTabVisible('addon-web-fonts', true);
-  controlBar.setTabVisible('addon-web-links', !!addons.webLinks.instance);
-  controlBar.setTabVisible('addon-webgl', true);
-  addonWebglWindow.setTextureAtlas(addons.webgl.instance!.textureAtlas!);
-  addons.webgl.instance!.onChangeTextureAtlas(e => addonWebglWindow.setTextureAtlas(e));
-  addons.webgl.instance!.onAddTextureAtlasCanvas(e => addonWebglWindow.appendTextureAtlas(e));
-  addons.webgl.instance!.onRemoveTextureAtlasCanvas(e => addonWebglWindow.removeTextureAtlas(e));
+  addonWebglWindow.setTextureAtlas(addons.webgl.instance.textureAtlas);
+  addons.webgl.instance.onChangeTextureAtlas(e => addonWebglWindow.setTextureAtlas(e));
+  addons.webgl.instance.onAddTextureAtlasCanvas(e => addonWebglWindow.appendTextureAtlas(e));
+  addons.webgl.instance.onRemoveTextureAtlasCanvas(e => addonWebglWindow.removeTextureAtlas(e));

  paddingElement.value = '0';
  addDomListener(paddingElement, 'change', setPadding);
  addDomListener(actionElements.findNext, 'keydown', (e) => {
    if (e.key === 'Enter') {
-      addons.search.instance!.findNext(actionElements.findNext.value, getSearchOptions());
+      addons.search.instance.findNext(actionElements.findNext.value, getSearchOptions());
      e.preventDefault();
    }
  });
  addDomListener(actionElements.findNext, 'input', (e) => {
-    addons.search.instance!.findNext(actionElements.findNext.value, getSearchOptions());
+    addons.search.instance.findNext(actionElements.findNext.value, getSearchOptions());
  });
  addDomListener(actionElements.findPrevious, 'keydown', (e) => {
    if (e.key === 'Enter') {
-      addons.search.instance!.findPrevious(actionElements.findPrevious.value, getSearchOptions());
+      addons.search.instance.findPrevious(actionElements.findPrevious.value, getSearchOptions());
      e.preventDefault();
    }
  });
  addDomListener(actionElements.findPrevious, 'input', (e) => {
-    addons.search.instance!.findPrevious(actionElements.findPrevious.value, getSearchOptions());
+    addons.search.instance.findPrevious(actionElements.findPrevious.value, getSearchOptions());
  });
  addDomListener(actionElements.findNext, 'blur', (e) => {
-    addons.search.instance!.clearActiveDecoration();
+    addons.search.instance.clearActiveDecoration();
  });
  addDomListener(actionElements.findPrevious, 'blur', (e) => {
-    addons.search.instance!.clearActiveDecoration();
+    addons.search.instance.clearActiveDecoration();
  });
 }

 function createTerminal(): Terminal {
  // Clean terminal
-  while (terminalContainer!.children.length) {
-    terminalContainer!.removeChild(terminalContainer!.children[0]);
+  while (terminalContainer.children.length) {
+    terminalContainer.removeChild(terminalContainer.children[0]);
  }

  const isWindows = ['Windows', 'Win16', 'Win32', 'WinCE'].indexOf(navigator.platform) >= 0;
  term = new Terminal({
-    scrollbar: { showScrollbar: true },
    allowProposedApi: true,
    windowsPty: isWindows ? {
      // In a real scenario, these values should be verified on the backend
@@ -292,7 +282,10 @@ function createTerminal(): Terminal {
      buildNumber: 22621
    } : undefined,
    fontFamily: '"Fira Code", monospace, "Powerline Extra Symbols"',
-    theme: { ...xtermjsTheme }
+    theme: { ...xtermjsTheme },
+    vtExtensions: {
+      win32InputMode: isWindows
+    }
  } as ITerminalOptions);

  // Load addons
@@ -300,7 +293,7 @@ function createTerminal(): Terminal {
  addons.search.instance = new SearchAddon();
  addons.serialize.instance = new SerializeAddon();
  addons.fit.instance = new FitAddon();
-  addons.image.instance = new ImageAddon!();
+  addons.image.instance = new ImageAddon();
  addons.progress.instance = new ProgressAddon();
  addons.unicodeGraphemes.instance = new UnicodeGraphemesAddon();
  addons.clipboard.instance = new ClipboardAddon();
@@ -321,7 +314,7 @@ function createTerminal(): Terminal {
  typedTerm.loadAddon(addons.webFonts.instance);
  typedTerm.loadAddon(addons.clipboard.instance);

-  (window as any).term = term;  // Expose `term` to window for debugging purposes
+  window.term = term;  // Expose `term` to window for debugging purposes
  term.onResize((size: { cols: number, rows: number }) => {
    if (!pid) {
      return;
@@ -340,7 +333,7 @@ function createTerminal(): Terminal {
  if (addons.webgl.instance) {
    try {
      typedTerm.loadAddon(addons.webgl.instance);
-      term.open(terminalContainer!);
+      term.open(terminalContainer);
    } catch (e) {
      console.warn('error during loading webgl addon:', e);
      addons.webgl.instance.dispose();
@@ -349,7 +342,7 @@ function createTerminal(): Terminal {
  }
  if (!typedTerm.element) {
    // webgl loading failed for some reason, attach with DOM renderer
-    term.open(terminalContainer!);
+    term.open(terminalContainer);
  }

  term.focus();
@@ -359,13 +352,13 @@ function createTerminal(): Terminal {
    if (optionsWindow.autoResize) {
      // In general this should be debounced to avoid excessive work on the main
      // thread by firing the expensive resize action repeatedly
-      addons.fit.instance!.fit();
+      addons.fit.instance.fit();
    }
  });
-  resizeObserver.observe(terminalContainer!);
+  resizeObserver.observe(terminalContainer);

  window.addEventListener('resize', () => {
-    terminalContainer!.style.width = document.body.clientWidth + 'px';
+    terminalContainer.style.width = document.body.clientWidth + 'px';
  });

  // fit is called within a setTimeout, cols and rows need this.
@@ -379,7 +372,7 @@ function createTerminal(): Terminal {
    if (useRealTerminal instanceof HTMLInputElement && !useRealTerminal.checked) {
      runFakeTerminal();
    } else {
-      const res = await fetch('/terminals?cols=' + term!.cols + '&rows=' + term!.rows, { method: 'POST' });
+      const res = await fetch('/terminals?cols=' + term.cols + '&rows=' + term.rows, { method: 'POST' });
      const processId = await res.text();
      pid = processId;
      socketURL += processId;
@@ -394,52 +387,52 @@ function createTerminal(): Terminal {
 }

 function runRealTerminal(): void {
-  addons.attach.instance = new AttachAddon(socket!);
-  term!.loadAddon(addons.attach.instance);
-  (term as any)._initialized = true;
-  initAddons(term!);
+  addons.attach.instance = new AttachAddon(socket);
+  term.loadAddon(addons.attach.instance);
+  term._initialized = true;
+  initAddons(term);
 }

 function runFakeTerminal(): void {
-  if ((term as any)._initialized) {
+  if (term._initialized) {
    return;
  }

-  (term as any)._initialized = true;
-  initAddons(term!);
+  term._initialized = true;
+  initAddons(term);

-  (term as any).prompt = () => {
-    term!.write('\r\n$ ');
+  term.prompt = () => {
+    term.write('\r\n$ ');
  };

-  term!.writeln('Welcome to xterm.js');
-  term!.writeln('This is a local terminal emulation, without a real terminal in the back-end.');
-  term!.writeln('Type some keys and commands to play around.');
-  term!.writeln('');
-  (term as any).prompt();
+  term.writeln('Welcome to xterm.js');
+  term.writeln('This is a local terminal emulation, without a real terminal in the back-end.');
+  term.writeln('Type some keys and commands to play around.');
+  term.writeln('');
+  term.prompt();

-  term!.onKey((e: { key: string, domEvent: KeyboardEvent }) => {
+  term.onKey((e: { key: string, domEvent: KeyboardEvent }) => {
    const ev = e.domEvent;
    const printable = !ev.altKey && !ev.ctrlKey && !ev.metaKey;

    if (ev.keyCode === 13) {
-      (term as any).prompt();
+      term.prompt();
    } else if (ev.keyCode === 8) {
      // Do not delete the prompt
-      if ((term as any)._core.buffer.x > 2) {
-        term!.write('\b \b');
+      if (term._core.buffer.x > 2) {
+        term.write('\b \b');
      }
    } else if (printable) {
-      term!.write(e.key);
+      term.write(e.key);
    }
  });
 }

 function updateTerminalContainerBackground(): void {
-  if (term!.options.allowTransparency) {
-    terminalContainer!.style.background = 'repeating-conic-gradient(#000000 0% 25%, #101010 0% 50%) 50% / 20px 20px';
+  if (term.options.allowTransparency) {
+    terminalContainer.style.background = 'repeating-conic-gradient(#000000 0% 25%, #101010 0% 50%) 50% / 20px 20px';
  } else {
-    terminalContainer!.style.background = term!.options.theme?.background ?? '#000000';
+    terminalContainer.style.background = term.options.theme?.background ?? '#000000';
  }
 }

@@ -449,19 +442,19 @@ function initAddons(term: Terminal): void {
  function postInitWebgl(): void {
    controlBar.setTabVisible('addon-webgl', true);
    setTimeout(() => {
-      addonWebglWindow.setTextureAtlas(addons.webgl.instance!.textureAtlas!);
-      addons.webgl.instance!.onChangeTextureAtlas(e => addonWebglWindow.setTextureAtlas(e));
-      addons.webgl.instance!.onAddTextureAtlasCanvas(e => addonWebglWindow.appendTextureAtlas(e));
+      addonWebglWindow.setTextureAtlas(addons.webgl.instance.textureAtlas);
+      addons.webgl.instance.onChangeTextureAtlas(e => addonWebglWindow.setTextureAtlas(e));
+      addons.webgl.instance.onAddTextureAtlasCanvas(e => addonWebglWindow.appendTextureAtlas(e));
    }, 500);
  }
  function preDisposeWebgl(): void {
    controlBar.setTabVisible('addon-webgl', false);
-    if (addons.webgl.instance!.textureAtlas) {
-      addons.webgl.instance!.textureAtlas.remove();
+    if (addons.webgl.instance.textureAtlas) {
+      addons.webgl.instance.textureAtlas.remove();
    }
  }

-  (Object.keys(addons) as AddonType[]).forEach(name => {
+  Object.keys(addons).forEach((name: AddonType) => {
    const addon = addons[name];
    const checkbox = document.createElement('input') as HTMLInputElement;
    checkbox.type = 'checkbox';
@@ -476,12 +469,12 @@ function initAddons(term: Terminal): void {
      term.unicode.activeVersion = '15-graphemes';
    }
    if (name === 'search' && checkbox.checked) {
-      addons[name].instance!.onDidChangeResults(e => updateFindResults(e));
+      addons[name].instance.onDidChangeResults(e => updateFindResults(e));
    }
    addDomListener(checkbox, 'change', () => {
      if (name === 'image') {
        if (checkbox.checked) {
-          const ctorOptionsJson = document.querySelector<HTMLTextAreaElement>('#image-options')!.value;
+          const ctorOptionsJson = document.querySelector<HTMLTextAreaElement>('#image-options').value;
          addon.instance = ctorOptionsJson
            ? new addons[name].ctor(JSON.parse(ctorOptionsJson))
            : new addons[name].ctor();
@@ -507,15 +500,9 @@ function initAddons(term: Terminal): void {
            term.unicode.activeVersion = '15-graphemes';
          } else if (name === 'search') {
            controlBar.setTabVisible('addon-search', true);
-            addons[name].instance!.onDidChangeResults(e => updateFindResults(e));
+            addons[name].instance.onDidChangeResults(e => updateFindResults(e));
          } else if (name === 'serialize') {
            controlBar.setTabVisible('addon-serialize', true);
-          } else if (name === 'ligatures') {
-            controlBar.setTabVisible('addon-ligatures', true);
-          } else if (name === 'progress') {
-            controlBar.setTabVisible('addon-progress', true);
-          } else if (name === 'webLinks') {
-            controlBar.setTabVisible('addon-web-links', true);
          }
        }
        catch {
@@ -532,12 +519,6 @@ function initAddons(term: Terminal): void {
          controlBar.setTabVisible('addon-search', false);
        } else if (name === 'serialize') {
          controlBar.setTabVisible('addon-serialize', false);
-        } else if (name === 'ligatures') {
-          controlBar.setTabVisible('addon-ligatures', false);
-        } else if (name === 'progress') {
-          controlBar.setTabVisible('addon-progress', false);
-        } else if (name === 'webLinks') {
-          controlBar.setTabVisible('addon-web-links', false);
        }
        addon.instance!.dispose();
        addon.instance = undefined;
@@ -609,17 +590,17 @@ function updateFindResults(e: { resultIndex: number, resultCount: number } | und

 function addDomListener(element: HTMLElement, type: string, handler: (...args: any[]) => any): void {
  element.addEventListener(type, handler);
-  (term as any)._core._register({ dispose: () => element.removeEventListener(type, handler) });
+  term._core._register({ dispose: () => element.removeEventListener(type, handler) });
 }

 function updateTerminalSize(): void {
  const width = optionsWindow.autoResize ? '100%'
-    : ((term as any).dimensions.css.canvas.width + (term as any)._core.viewport.scrollBarWidth).toString() + 'px';
+    : (term.dimensions.css.canvas.width + term._core.viewport.scrollBarWidth).toString() + 'px';
  const height = optionsWindow.autoResize ? '100%'
-    : ((term as any).dimensions.css.canvas.height).toString() + 'px';
-  terminalContainer!.style.width = width;
-  terminalContainer!.style.height = height;
-  addons.fit.instance!.fit();
+    : (term.dimensions.css.canvas.height).toString() + 'px';
+  terminalContainer.style.width = width;
+  terminalContainer.style.height = height;
+  addons.fit.instance.fit();
 }

 (console as any).image = (source: ImageData | HTMLCanvasElement, scale: number = 1) => {
@@ -5,15 +5,14 @@

 import { BaseWindow } from './baseWindow';
 import type { IControlWindow } from '../controlBar';
-import type { IImageAddonOptions } from '@xterm/addon-image';

 export class AddonImageWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'addon-image';
  public readonly label = 'image';

-  private _imageStorageLimitInput!: HTMLInputElement;
-  private _imageShowPlaceholderCheckbox!: HTMLInputElement;
-  private _imageOptionsTextarea!: HTMLTextAreaElement;
+  private _imageStorageLimitInput: HTMLInputElement;
+  private _imageShowPlaceholderCheckbox: HTMLInputElement;
+  private _imageOptionsTextarea: HTMLTextAreaElement;

  public build(container: HTMLElement): void {
    // Storage limit
@@ -47,20 +46,6 @@ export class AddonImageWindow extends BaseWindow implements IControlWindow {
    this._imageOptionsTextarea.rows = 12;
    optionsLabel.appendChild(this._imageOptionsTextarea);
    container.appendChild(optionsLabel);
-
-    container.appendChild(document.createElement('br'));
-    container.appendChild(document.createElement('br'));
-
-    const dl = document.createElement('dl');
-    const dt = document.createElement('dt');
-    dt.textContent = 'Image Test';
-    dl.appendChild(dt);
-    this._addDdWithButton(dl, 'image-demo1', 'snake (sixel)');
-    this._addDdWithButton(dl, 'image-demo2', 'oranges (sixel)');
-    this._addDdWithButton(dl, 'image-demo3', 'palette (iip)');
-    container.appendChild(dl);
-
-    this._initImageAddonExposed();
  }

  public get imageStorageLimitInput(): HTMLInputElement {
@@ -74,93 +59,4 @@ export class AddonImageWindow extends BaseWindow implements IControlWindow {
  public get imageOptionsTextarea(): HTMLTextAreaElement {
    return this._imageOptionsTextarea;
  }
-
-  private _addDdWithButton(dl: HTMLElement, id: string, label: string): void {
-    const dd = document.createElement('dd');
-    const button = document.createElement('button');
-    button.id = id;
-    button.textContent = label;
-    dd.appendChild(button);
-    dl.appendChild(dd);
-  }
-
-  private _initImageAddonExposed(): void {
-    const imageAddon = this._addons.image.instance!;
-    const defaultOptions: IImageAddonOptions = (imageAddon as any)._defaultOpts;
-    const limitStorageElement = document.querySelector<HTMLInputElement>('#image-storagelimit')!;
-    limitStorageElement.valueAsNumber = imageAddon.storageLimit;
-    this._addDomListener(limitStorageElement, 'change', () => {
-      try {
-        imageAddon.storageLimit = limitStorageElement.valueAsNumber;
-        limitStorageElement.valueAsNumber = imageAddon.storageLimit;
-        console.log('changed storageLimit to', imageAddon.storageLimit);
-      } catch (e) {
-        limitStorageElement.valueAsNumber = imageAddon.storageLimit;
-        console.log('storageLimit at', imageAddon.storageLimit);
-        throw e;
-      }
-    });
-    const showPlaceholderElement = document.querySelector<HTMLInputElement>('#image-showplaceholder')!;
-    showPlaceholderElement.checked = imageAddon.showPlaceholder;
-    this._addDomListener(showPlaceholderElement, 'change', () => {
-      imageAddon.showPlaceholder = showPlaceholderElement.checked;
-    });
-    const ctorOptionsElement = document.querySelector<HTMLTextAreaElement>('#image-options')!;
-    ctorOptionsElement.value = JSON.stringify(defaultOptions, null, 2);
-
-    const sixelDemo = (url: string) => () => fetch(url)
-      .then(resp => resp.arrayBuffer())
-      .then(buffer => {
-        this._terminal.write('\r\n');
-        this._terminal.write(new Uint8Array(buffer));
-      });
-
-    const iipDemo = (url: string) => () => fetch(url)
-      .then(resp => resp.arrayBuffer())
-      .then(buffer => {
-        const data = new Uint8Array(buffer);
-        let sdata = '';
-        for (let i = 0; i < data.length; ++i) sdata += String.fromCharCode(data[i]);
-        this._terminal.write('\r\n');
-        this._terminal.write(`\x1b]1337;File=inline=1;size=${data.length}:${btoa(sdata)}\x1b\\`);
-      });
-
-    document.getElementById('image-demo1')!.addEventListener('click',
-      sixelDemo('https://raw.githubusercontent.com/saitoha/libsixel/master/images/snake.six'));
-    document.getElementById('image-demo2')!.addEventListener('click',
-      sixelDemo('https://raw.githubusercontent.com/jerch/node-sixel/master/testfiles/test2.sixel'));
-    document.getElementById('image-demo3')!.addEventListener('click',
-      iipDemo('https://raw.githubusercontent.com/jerch/node-sixel/master/palette.png'));
-
-    // demo for image retrieval API
-    this._terminal.element!.addEventListener('click', (ev: MouseEvent) => {
-      if (!ev.ctrlKey || !imageAddon) return;
-
-      // TODO...
-      // if (ev.altKey) {
-      //   const sel = term.getSelectionPosition();
-      //   if (sel) {
-      //     addons.image.instance
-      //       .extractCanvasAtBufferRange(term.getSelectionPosition())
-      //       ?.toBlob(data => window.open(URL.createObjectURL(data), '_blank'));
-      //     return;
-      //   }
-      // }
-
-      const pos = (this._terminal as any)._core._mouseService!.getCoords(ev, (this._terminal as any)._core.screenElement!, this._terminal.cols, this._terminal.rows);
-      const x = pos[0] - 1;
-      const y = pos[1] - 1;
-      const canvas = ev.shiftKey
-        // ctrl+shift+click: get single tile
-        ? imageAddon.extractTileAtBufferCell(x, this._terminal.buffer.active.viewportY + y)
-        // ctrl+click: get original image
-        : imageAddon.getImageAtBufferCell(x, this._terminal.buffer.active.viewportY + y);
-      canvas?.toBlob(data => data && window.open(URL.createObjectURL(data), '_blank'));
-    });
-  }
-
-  private _addDomListener(element: HTMLElement, type: string, handler: (...args: any[]) => any): void {
-    element.addEventListener(type, handler);
-    (this._terminal as any)._core._register({ dispose: () => element.removeEventListener(type, handler) });
-  }
 }
@@ -1,44 +0,0 @@
-/**
- * Copyright (c) 2026 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { BaseWindow } from './baseWindow';
-import type { IControlWindow } from '../controlBar';
-
-export class AddonLigaturesWindow extends BaseWindow implements IControlWindow {
-  public readonly id = 'addon-ligatures';
-  public readonly label = 'ligatures';
-
-  public build(container: HTMLElement): void {
-    const dl = document.createElement('dl');
-    const dt = document.createElement('dt');
-    dt.textContent = 'Ligatures Addon';
-    dl.appendChild(dt);
-
-    const dd = document.createElement('dd');
-    const button = document.createElement('button');
-    button.id = 'ligatures-test';
-    button.textContent = 'Common ligatures';
-    button.title = 'Write common ligatures sequences';
-    button.addEventListener('click', () => this._ligaturesTest());
-    dd.appendChild(button);
-    dl.appendChild(dd);
-
-    container.appendChild(dl);
-  }
-
-  private _ligaturesTest(): void {
-    this._terminal.write([
-      '',
-      '-<< -< -<- <-- <--- <<- <- -> ->> --> ---> ->- >- >>-',
-      '=<< =< =<= <== <=== <<= <= => =>> ==> ===> =>= >= >>=',
-      '<-> <--> <---> <----> <=> <==> <===> <====> :: ::: __',
-      '<~~ </ </> /> ~~> == != /= ~= <> === !== !=== =/= =!=',
-      '<: := *= *+ <* <*> *> <| <|> |> <. <.> .> +* =* =: :>',
-      '(* *) /* */ [| |] {| |} ++ +++ \/ /\ |- -| <!-- <!---',
-      '==== ===== ====== ======= ======== =========',
-      '---- ----- ------ ------- -------- ---------'
-    ].join('\r\n'));
-  }
-}
@@ -1,135 +0,0 @@
-/**
- * Copyright (c) 2026 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { BaseWindow } from './baseWindow';
-import type { IControlWindow } from '../controlBar';
-import type { IProgressState } from '@xterm/addon-progress';
-
-export class AddonProgressWindow extends BaseWindow implements IControlWindow {
-  public readonly id = 'addon-progress';
-  public readonly label = 'progress';
-
-  public build(container: HTMLElement): void {
-    const dl = document.createElement('dl');
-    const dt = document.createElement('dt');
-    dt.textContent = 'Progress Addon';
-    dl.appendChild(dt);
-
-    this._addDdWithButton(dl, 'progress-run', 'full set run', '');
-    this._addDdWithButton(dl, 'progress-0', 'state 0: remove', '');
-    this._addDdWithButton(dl, 'progress-1', 'state 1: set 20%', '');
-    this._addDdWithButton(dl, 'progress-2', 'state 2: error', '');
-    this._addDdWithButton(dl, 'progress-3', 'state 3: indeterminate', '');
-    this._addDdWithButton(dl, 'progress-4', 'state 4: pause', '');
-
-    const progressDd = document.createElement('dd');
-    const progressDiv = document.createElement('div');
-    progressDiv.id = 'progress-progress';
-    const progressPercent = document.createElement('div');
-    progressPercent.id = 'progress-percent';
-    const progressIndeterminate = document.createElement('div');
-    progressIndeterminate.id = 'progress-indeterminate';
-    progressDiv.appendChild(progressPercent);
-    progressDiv.appendChild(progressIndeterminate);
-    progressDd.appendChild(progressDiv);
-    dl.appendChild(progressDd);
-
-    const stateDd = document.createElement('dd');
-    const stateDiv = document.createElement('div');
-    stateDiv.id = 'progress-state';
-    stateDiv.textContent = 'State:';
-    stateDd.appendChild(stateDiv);
-    dl.appendChild(stateDd);
-
-    container.appendChild(dl);
-
-    this._initProgress();
-    this._addProgressStyles(container);
-  }
-
-  private _addDdWithButton(dl: HTMLElement, id: string, label: string, title: string): void {
-    const dd = document.createElement('dd');
-    const button = document.createElement('button');
-    button.id = id;
-    button.textContent = label;
-    if (title) {
-      button.title = title;
-    }
-    dd.appendChild(button);
-    dl.appendChild(dd);
-  }
-
-  private _initProgress(): void {
-    const states = { 0: 'remove', 1: 'set', 2: 'error', 3: 'indeterminate', 4: 'pause' };
-    const colors = { 0: '', 1: 'green', 2: 'red', 3: '', 4: 'yellow' };
-
-    function progressHandler({ state, value }: IProgressState): void {
-      // Simulate windows taskbar hack by windows terminal:
-      // Since the taskbar has no means to indicate error/pause state other than by coloring
-      // the current progress, we move 0 to 10% and distribute higher values in the remaining 90 %
-      // NOTE: This is most likely not what you want to do for other progress indicators,
-      //       that have a proper visual state for error/paused.
-      value = Math.min(10 + value * 0.9, 100);
-      document.getElementById('progress-percent')!.style.width = `${value}%`;
-      document.getElementById('progress-percent')!.style.backgroundColor = colors[state];
-      document.getElementById('progress-state')!.innerText = `State: ${states[state]}`;
-
-      document.getElementById('progress-percent')!.style.display = state === 3 ? 'none' : 'block';
-      document.getElementById('progress-indeterminate')!.style.display = state === 3 ? 'block' : 'none';
-    }
-
-    const progressAddon = this._addons.progress.instance!;
-    progressAddon.onChange(progressHandler);
-
-    const initialProgress = progressAddon.progress;
-    progressHandler(initialProgress);
-
-    document.getElementById('progress-run')!.addEventListener('click', async () => {
-      this._terminal.write('\x1b]9;4;0\x1b\\');
-      for (let i = 0; i <= 100; i += 5) {
-        this._terminal.write(`\x1b]9;4;1;${i}\x1b\\`);
-        await new Promise(res => setTimeout(res, 200));
-      }
-    });
-    document.getElementById('progress-0')!.addEventListener('click', () => this._terminal.write('\x1b]9;4;0\x1b\\'));
-    document.getElementById('progress-1')!.addEventListener('click', () => this._terminal.write('\x1b]9;4;1;20\x1b\\'));
-    document.getElementById('progress-2')!.addEventListener('click', () => this._terminal.write('\x1b]9;4;2\x1b\\'));
-    document.getElementById('progress-3')!.addEventListener('click', () => this._terminal.write('\x1b]9;4;3\x1b\\'));
-    document.getElementById('progress-4')!.addEventListener('click', () => this._terminal.write('\x1b]9;4;4\x1b\\'));
-  }
-
-  private _addProgressStyles(container: HTMLElement): void {
-    const style = document.createElement('style');
-    style.textContent = `
-      #progress-progress {
-        border: 1px solid black;
-        height: 10px;
-      }
-      #progress-percent {
-        height: 100%;
-      }
-      #progress-indeterminate {
-        display: none;
-        position: relative;
-        height: 100%;
-      }
-      #progress-indeterminate:before {
-        content: '';
-        position: absolute;
-        left: 0;
-        bottom: 0px;
-        width: 50px;
-        height: 10px;
-        background: blue;
-        animation: ballbns 1s ease-in-out infinite alternate;
-      }
-      @keyframes ballbns {
-        0% {  left: 0; transform: translateX(0%); }
-        100% {  left: 100%; transform: translateX(-100%); }
-      }
-    `;
-    container.appendChild(style);
-  }
-}
@@ -10,13 +10,13 @@ export class AddonSearchWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'addon-search';
  public readonly label = 'search';

-  private _findNextInput!: HTMLInputElement;
-  private _findPreviousInput!: HTMLInputElement;
-  private _findResultsSpan!: HTMLElement;
-  private _regexCheckbox!: HTMLInputElement;
-  private _caseSensitiveCheckbox!: HTMLInputElement;
-  private _wholeWordCheckbox!: HTMLInputElement;
-  private _highlightAllMatchesCheckbox!: HTMLInputElement;
+  private _findNextInput: HTMLInputElement;
+  private _findPreviousInput: HTMLInputElement;
+  private _findResultsSpan: HTMLElement;
+  private _regexCheckbox: HTMLInputElement;
+  private _caseSensitiveCheckbox: HTMLInputElement;
+  private _wholeWordCheckbox: HTMLInputElement;
+  private _highlightAllMatchesCheckbox: HTMLInputElement;

  public build(container: HTMLElement): void {
    const wrapper = document.createElement('div');
@@ -10,10 +10,10 @@ export class AddonSerializeWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'addon-serialize';
  public readonly label = 'serialize';

-  private _serializeOutputPre!: HTMLPreElement;
-  private _htmlSerializeOutputPre!: HTMLPreElement;
-  private _htmlSerializeOutputResult!: HTMLElement;
-  private _writeToTerminalCheckbox!: HTMLInputElement;
+  private _serializeOutputPre: HTMLPreElement;
+  private _htmlSerializeOutputPre: HTMLPreElement;
+  private _htmlSerializeOutputResult: HTMLElement;
+  private _writeToTerminalCheckbox: HTMLInputElement;

  public build(container: HTMLElement): void {
    const wrapper = document.createElement('div');
@@ -64,7 +64,7 @@ export class AddonSerializeWindow extends BaseWindow implements IControlWindow {
  }

  private _serializeButtonHandler(): void {
-    const output = this._addons.serialize.instance!.serialize();
+    const output = this._addons.serialize.instance.serialize();
    const outputString = JSON.stringify(output);

    this._serializeOutputPre.innerText = outputString;
@@ -75,7 +75,7 @@ export class AddonSerializeWindow extends BaseWindow implements IControlWindow {
  }

  private _htmlSerializeButtonHandler(): void {
-    const output = this._addons.serialize.instance!.serializeAsHTML();
+    const output = this._addons.serialize.instance.serializeAsHTML();
    this._htmlSerializeOutputPre.innerText = output;

    // Deprecated, but the most supported for now.
@@ -1,52 +0,0 @@
-/**
- * Copyright (c) 2026 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { BaseWindow } from './baseWindow';
-import type { IControlWindow } from '../controlBar';
-
-export class AddonWebLinksWindow extends BaseWindow implements IControlWindow {
-  public readonly id = 'addon-web-links';
-  public readonly label = 'web-links';
-
-  public build(container: HTMLElement): void {
-    const dl = document.createElement('dl');
-    const dt = document.createElement('dt');
-    dt.textContent = 'Weblinks Addon';
-    dl.appendChild(dt);
-
-    const dd = document.createElement('dd');
-    const button = document.createElement('button');
-    button.id = 'weblinks-test';
-    button.textContent = 'Test URLs';
-    button.title = 'Various url conditions from demo data, hover&click to test';
-    button.addEventListener('click', () => this._testWeblinks());
-    dd.appendChild(button);
-    dl.appendChild(dd);
-
-    container.appendChild(dl);
-  }
-
-  private _testWeblinks(): void {
-    const linkExamples = `
-  aaa http://example.com aaa http://example.com aaa
-  \uFFE5\uFFE5\uFFE5 http://example.com aaa http://example.com aaa
-  aaa http://example.com \uFFE5\uFFE5\uFFE5 http://example.com aaa
-  \uFFE5\uFFE5\uFFE5 http://example.com \uFFE5\uFFE5\uFFE5 http://example.com aaa
-  aaa https://ko.wikipedia.org/wiki/\uC704\uD0A4\uBC31\uACFC:\uB300\uBB38 aaa https://ko.wikipedia.org/wiki/\uC704\uD0A4\uBC31\uACFC:\uB300\uBB38 aaa
-  \uFFE5\uFFE5\uFFE5 https://ko.wikipedia.org/wiki/\uC704\uD0A4\uBC31\uACFC:\uB300\uBB38 aaa https://ko.wikipedia.org/wiki/\uC704\uD0A4\uBC31\uACFC:\uB300\uBB38 \uFFE5\uFFE5\uFFE5
-  aaa http://test:password@example.com/some_path aaa
-  brackets enclosed:
-  aaa [http://example.de] aaa
-  aaa (http://example.de) aaa
-  aaa <http://example.de> aaa
-  aaa {http://example.de} aaa
-  ipv6 https://[::1]/with/some?vars=and&a#hash aaa
-  stop at final '.': This is a sentence with an url to http://example.com.
-  stop at final '?': Is this the right url http://example.com/?
-  stop at final '?': Maybe this one http://example.com/with?arguments=false?
-  `;
-    this._terminal.write(linkExamples.split('\n').join('\r\n'));
-  }
-}
@@ -10,7 +10,7 @@ export class AddonsWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'addons';
  public readonly label = 'Addons';

-  private _addonsContainer!: HTMLElement;
+  private _addonsContainer: HTMLElement;

  public build(container: HTMLElement): void {
    // Description
@@ -30,14 +30,14 @@ export class CellInspectorWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'cell-inspector';
  public readonly label = 'Cell Inspector';

-  private _container!: HTMLElement;
-  private _positionEl!: HTMLElement;
-  private _charEl!: HTMLElement;
-  private _codeEl!: HTMLElement;
-  private _widthEl!: HTMLElement;
-  private _fgEl!: HTMLElement;
-  private _bgEl!: HTMLElement;
-  private _attrsEl!: HTMLElement;
+  private _container: HTMLElement;
+  private _positionEl: HTMLElement;
+  private _charEl: HTMLElement;
+  private _codeEl: HTMLElement;
+  private _widthEl: HTMLElement;
+  private _fgEl: HTMLElement;
+  private _bgEl: HTMLElement;
+  private _attrsEl: HTMLElement;

  public build(container: HTMLElement): void {
    this._container = container;
@@ -10,7 +10,7 @@ export class GpuWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'gpu';
  public readonly label = 'WebGL';

-  private _textureAtlasContainer!: HTMLElement;
+  private _textureAtlasContainer: HTMLElement;

  public build(container: HTMLElement): void {
    const zoomCheckbox = document.createElement('input');
@@ -80,8 +80,8 @@ export class OptionsWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'options';
  public readonly label = 'Options';

-  private _container!: HTMLElement;
-  private _optionsContainer!: HTMLElement;
+  private _container: HTMLElement;
+  private _optionsContainer: HTMLElement;
  private _autoResize: boolean = true;

  constructor(
@@ -109,26 +109,24 @@ export class OptionsWindow extends BaseWindow implements IControlWindow {

  public initOptions(addDomListener: (el: HTMLElement, type: string, handler: (...args: any[]) => any) => void): void {
    const blacklistedOptions = [
+      'cancelEvents',
      'convertEol',
      'termName',
      'cols', 'rows',
      'documentOverride',
      'linkHandler',
      'logger',
+      'overviewRuler',
      'quirks',
      'theme',
      'vtExtensions',
      'windowOptions',
      'windowsPty',
    ];
-    const nestedBooleanOptions: { label: string, path: string[], prop: string }[] = [
-      { label: 'scrollbar.showScrollbar', path: ['scrollbar'], prop: 'showScrollbar' },
-      { label: 'scrollbar.showArrows', path: ['scrollbar'], prop: 'showArrows' },
-      { label: 'scrollbar.overviewRuler.showTopBorder', path: ['scrollbar', 'overviewRuler'], prop: 'showTopBorder' },
-      { label: 'scrollbar.overviewRuler.showBottomBorder', path: ['scrollbar', 'overviewRuler'], prop: 'showBottomBorder' },
-      { label: 'vtExtensions.kittyKeyboard', path: ['vtExtensions'], prop: 'kittyKeyboard' },
-      { label: 'vtExtensions.kittySgrBoldFaintControl', path: ['vtExtensions'], prop: 'kittySgrBoldFaintControl' },
-      { label: 'vtExtensions.win32InputMode', path: ['vtExtensions'], prop: 'win32InputMode' }
+    const nestedBooleanOptions: { label: string, parent: string, prop: string }[] = [
+      { label: 'vtExtensions.kittyKeyboard', parent: 'vtExtensions', prop: 'kittyKeyboard' },
+      { label: 'vtExtensions.kittySgrBoldFaintControl', parent: 'vtExtensions', prop: 'kittySgrBoldFaintControl' },
+      { label: 'vtExtensions.win32InputMode', parent: 'vtExtensions', prop: 'win32InputMode' }
    ];
    const stringOptions: { [key: string]: string[] | null } = {
      cursorStyle: ['block', 'underline', 'bar'],
@@ -145,7 +143,7 @@ export class OptionsWindow extends BaseWindow implements IControlWindow {
    const booleanOptions: string[] = [];
    const numberOptions: string[] = [];
    options.filter(o => blacklistedOptions.indexOf(o) === -1).forEach(o => {
-      switch (typeof (this._terminal.options as Record<string, unknown>)[o]) {
+      switch (typeof this._terminal.options[o]) {
        case 'boolean':
          booleanOptions.push(o);
          break;
@@ -162,27 +160,25 @@ export class OptionsWindow extends BaseWindow implements IControlWindow {
    let html = '';
    html += '<div class="option-group">';
    booleanOptions.forEach(o => {
-      html += `<div class="option"><label><input id="opt-${o}" type="checkbox" ${(this._terminal.options as Record<string, unknown>)[o] ? 'checked' : ''}/> ${o}</label></div>`;
+      html += `<div class="option"><label><input id="opt-${o}" type="checkbox" ${this._terminal.options[o] ? 'checked' : ''}/> ${o}</label></div>`;
    });
-    nestedBooleanOptions.forEach(({ label, path, prop }) => {
-      const options = this._terminal.options as Record<string, unknown>;
-      const parent = path.reduce<Record<string, unknown> | undefined>((acc, key) => (acc as Record<string, unknown> | undefined)?.[key] as Record<string, unknown> | undefined, options);
-      const checked = (parent as Record<string, unknown> | undefined)?.[prop] ?? false;
+    nestedBooleanOptions.forEach(({ label, parent, prop }) => {
+      const checked = this._terminal.options[parent]?.[prop] ?? false;
      html += `<div class="option"><label><input id="opt-${label.replace('.', '-')}" type="checkbox" ${checked ? 'checked' : ''}/> ${label}</label></div>`;
    });
    html += '</div><div class="option-group">';
    numberOptions.forEach(o => {
-      html += `<div class="option"><label>${o} <input id="opt-${o}" type="number" value="${(this._terminal.options as Record<string, unknown>)[o] ?? ''}" step="${o === 'lineHeight' || o === 'scrollSensitivity' ? '0.1' : '1'}"/></label></div>`;
+      html += `<div class="option"><label>${o} <input id="opt-${o}" type="number" value="${this._terminal.options[o] ?? ''}" step="${o === 'lineHeight' || o === 'scrollSensitivity' ? '0.1' : '1'}"/></label></div>`;
    });
    html += '</div><div class="option-group">';
    Object.keys(stringOptions).forEach(o => {
      if (o === 'colsRows') {
        html += `<div class="option"><label>size (<var>cols</var><code>x</code><var>rows</var> or <code>auto</code>) <input id="opt-${o}" type="text" value="auto"/></label></div>`;
      } else if (stringOptions[o]) {
-        const selectedOption = o === 'theme' ? 'xtermjs' : (this._terminal.options as Record<string, unknown>)[o];
+        const selectedOption = o === 'theme' ? 'xtermjs' : this._terminal.options[o];
        html += `<div class="option"><label>${o} <select id="opt-${o}">${stringOptions[o]!.map(v => `<option ${v === selectedOption ? 'selected' : ''}>${v}</option>`).join('')}</select></label></div>`;
      } else {
-        html += `<div class="option"><label>${o} <input id="opt-${o}" type="text" value="${(this._terminal.options as Record<string, unknown>)[o]}"/></label></div>`;
+        html += `<div class="option"><label>${o} <input id="opt-${o}" type="text" value="${this._terminal.options[o]}"/></label></div>`;
      }
    });
    html += '</div>';
@@ -194,29 +190,18 @@ export class OptionsWindow extends BaseWindow implements IControlWindow {
      const input = document.getElementById(`opt-${o}`) as HTMLInputElement;
      addDomListener(input, 'change', () => {
        console.log('change', o, input.checked);
-        (this._terminal.options as Record<string, unknown>)[o] = input.checked;
+        this._terminal.options[o] = input.checked;
        if (o ==='allowTransparency') {
          this._terminal.options.theme = this._getTheme();
          this._handlers.updateTerminalContainerBackground();
        }
      });
    });
-    nestedBooleanOptions.forEach(({ label, path, prop }) => {
+    nestedBooleanOptions.forEach(({ label, parent, prop }) => {
      const input = document.getElementById(`opt-${label.replace('.', '-')}`) as HTMLInputElement;
      addDomListener(input, 'change', () => {
        console.log('change', label, input.checked);
-        const options = this._terminal.options as Record<string, unknown>;
-        if (path.length === 1) {
-          const parentKey = path[0];
-          options[parentKey] = { ...(options[parentKey] as Record<string, unknown> | undefined), [prop]: input.checked };
-          return;
-        }
-        if (path.length === 2) {
-          const [parentKey, childKey] = path;
-          const parent = (options[parentKey] as Record<string, unknown> | undefined) ?? {};
-          const child = (parent[childKey] as Record<string, unknown> | undefined) ?? {};
-          options[parentKey] = { ...parent, [childKey]: { ...child, [prop]: input.checked } };
-        }
+        this._terminal.options[parent] = { ...this._terminal.options[parent], [prop]: input.checked };
      });
    });
    numberOptions.forEach(o => {
@@ -231,7 +216,7 @@ export class OptionsWindow extends BaseWindow implements IControlWindow {
          this._terminal.options.scrollback = parseInt(input.value);
          setTimeout(() => this._handlers.updateTerminalSize(), 5);
        } else {
-          (this._terminal.options as Record<string, unknown>)[o] = parseInt(input.value);
+          this._terminal.options[o] = parseInt(input.value);
        }
        this._handlers.updateTerminalSize();
      });
@@ -240,7 +225,7 @@ export class OptionsWindow extends BaseWindow implements IControlWindow {
      const input = document.getElementById(`opt-${o}`) as HTMLInputElement;
      addDomListener(input, 'change', () => {
        console.log('change', o, input.value);
-        let value: unknown = input.value;
+        let value: any = input.value;
        if (o === 'colsRows') {
          const m = input.value.match(/^([0-9]+)x([0-9]+)$/);
          if (m) {
@@ -254,7 +239,7 @@ export class OptionsWindow extends BaseWindow implements IControlWindow {
        } else if (o === 'theme') {
          value = this._getTheme();
        }
-        (this._terminal.options as Record<string, unknown>)[o] = value;
+        this._terminal.options[o] = value;
        if (o === 'theme') {
          this._handlers.updateTerminalContainerBackground();
        }
@@ -274,11 +259,11 @@ export class OptionsWindow extends BaseWindow implements IControlWindow {
  }

  private _getTheme(): ITheme {
-    const input = document.querySelector<HTMLInputElement>('#opt-theme')!;
-    let theme: ITheme = {};
+    const input = document.querySelector<HTMLInputElement>('#opt-theme');
+    let theme: ITheme;
    switch (input.value) {
      case 'default':
-        theme = {};
+        theme = undefined;
        break;
      case 'xtermjs':
        theme = { ...xtermjsTheme };
@@ -10,7 +10,7 @@ export class StyleWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'style';
  public readonly label = 'Style';

-  private _paddingElement!: HTMLInputElement;
+  private _paddingElement: HTMLInputElement;

  public build(container: HTMLElement): void {
    const wrapper = document.createElement('div');
@@ -8,6 +8,8 @@ import type { IControlWindow } from '../controlBar';
 import { BaseWindow } from './baseWindow';
 import type { IDisposable, Terminal } from '@xterm/xterm';
 import type { AddonCollection } from 'types';
+import type { IProgressState } from '@xterm/addon-progress';
+import type { IImageAddonOptions } from '@xterm/addon-image';

 export class TestWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'test';
@@ -64,13 +66,61 @@ export class TestWindow extends BaseWindow implements IControlWindow {
    this._addDdWithButton(dl, 'add-overview-ruler', 'Add Overview Ruler', 'Add an overview ruler to the terminal', () => addOverviewRuler(this._terminal));
    this._addDdWithButton(dl, 'decoration-stress-test', 'Stress Test', 'Toggle between adding and removing a decoration to each line', () => decorationStressTest(this._terminal));

+    // Ligatures Addon section
+    this._addDt(dl, 'Ligatures Addon');
+    this._addDdWithButton(dl, 'ligatures-test', 'Common ligatures', 'Write common ligatures sequences', () => ligaturesTest(this._terminal));
+
+    // Weblinks Addon section
+    this._addDt(dl, 'Weblinks Addon');
+    this._addDdWithButton(dl, 'weblinks-test', 'Test URLs', 'Various url conditions from demo data, hover&click to test', () => testWeblinks(this._terminal));
+
+    // Image Test section
+    this._addDt(dl, 'Image Test');
+    this._addDdWithButton(dl, 'image-demo1', 'snake (sixel)', '');
+    this._addDdWithButton(dl, 'image-demo2', 'oranges (sixel)', '');
+    this._addDdWithButton(dl, 'image-demo3', 'palette (iip)', '');
+
    // Events Test section
    this._addDt(dl, 'Events Test');
    this._addDdWithButton(dl, 'event-focus', 'focus', '', () => this._terminal.focus());
    this._addDdWithButton(dl, 'event-blur', 'blur', '', () => this._terminal.blur());

+    // Progress Addon section
+    this._addDt(dl, 'Progress Addon');
+    this._addDdWithButton(dl, 'progress-run', 'full set run', '');
+    this._addDdWithButton(dl, 'progress-0', 'state 0: remove', '');
+    this._addDdWithButton(dl, 'progress-1', 'state 1: set 20%', '');
+    this._addDdWithButton(dl, 'progress-2', 'state 2: error', '');
+    this._addDdWithButton(dl, 'progress-3', 'state 3: indeterminate', '');
+    this._addDdWithButton(dl, 'progress-4', 'state 4: pause', '');
+
+    // Progress bar
+    const progressDd = document.createElement('dd');
+    const progressDiv = document.createElement('div');
+    progressDiv.id = 'progress-progress';
+    const progressPercent = document.createElement('div');
+    progressPercent.id = 'progress-percent';
+    const progressIndeterminate = document.createElement('div');
+    progressIndeterminate.id = 'progress-indeterminate';
+    progressDiv.appendChild(progressPercent);
+    progressDiv.appendChild(progressIndeterminate);
+    progressDd.appendChild(progressDiv);
+    dl.appendChild(progressDd);
+
+    // Progress state
+    const stateDd = document.createElement('dd');
+    const stateDiv = document.createElement('div');
+    stateDiv.id = 'progress-state';
+    stateDiv.textContent = 'State:';
+    stateDd.appendChild(stateDiv);
+    dl.appendChild(stateDd);
+
    wrapper.appendChild(dl);
    container.appendChild(wrapper);
+
+    initProgress(this._terminal, this._addons);
+    this._addProgressStyles(container);
+    initImageAddonExposed(this._terminal, this._addons);
  }

  private _addDt(dl: HTMLElement, text: string): void {
@@ -89,9 +139,7 @@ export class TestWindow extends BaseWindow implements IControlWindow {
    }
    dd.appendChild(button);
    dl.appendChild(dd);
-    if (handler) {
-      button.addEventListener('click', handler);
-    }
+    button.addEventListener('click', handler);
  }

  private _addDdWithCheckbox(dl: HTMLElement, id: string, label: string, title: string, checked: boolean): void {
@@ -111,6 +159,38 @@ export class TestWindow extends BaseWindow implements IControlWindow {
    dl.appendChild(dd);
  }

+  private _addProgressStyles(container: HTMLElement): void {
+    const style = document.createElement('style');
+    style.textContent = `
+      #progress-progress {
+        border: 1px solid black;
+        height: 10px;
+      }
+      #progress-percent {
+        height: 100%;
+      }
+      #progress-indeterminate {
+        display: none;
+        position: relative;
+        height: 100%;
+      }
+      #progress-indeterminate:before {
+        content: '';
+        position: absolute;
+        left: 0;
+        bottom: 0px;
+        width: 50px;
+        height: 10px;
+        background: blue;
+        animation: ballbns 1s ease-in-out infinite alternate;
+      }
+      @keyframes ballbns {
+        0% {  left: 0; transform: translateX(0%); }
+        100% {  left: 100%; transform: translateX(-100%); }
+      }
+    `;
+    container.appendChild(style);
+  }
 }

 /**
@@ -385,7 +465,7 @@ function customGlyphAlignmentHandler(term: Terminal): void {
  while (fillChars.length > 0) {
    const batch = fillChars.splice(0, 10);
    for (const fillChar of batch) {
-      term.write(`${fillChar.codePointAt(0)!.toString(16).toUpperCase().padEnd(5, ' ')} `);
+      term.write(`${fillChar.codePointAt(0).toString(16).toUpperCase().padEnd(5, ' ')} `);
    }
    term.write('\n\r');
    for (let i = 0; i < 3; i++) {
@@ -397,13 +477,6 @@ function customGlyphAlignmentHandler(term: Terminal): void {
    }
  }

-  term.write('\x1b[0mTriangular fill tests:\x1b[36m\n\r');
-  term.write('1FB9C 1FB9D 1FB9E 1FB9F all\n\r');
-  term.write('\u{02592}\u{02592}\u{02592}\u{1FB9C}  \u{1FB9D}\u{02592}\u{02592}\u{02592}  \u{00020}\u{00020}\u{00020}\u{1FB9E}  \u{1FB9F}\u{00020}\u{00020}\u{00020}  \u{00020}\u{1FB9E}\u{1FB9F}\u{00020}\n\r');
-  term.write('\u{02592}\u{02592}\u{1FB9C}\u{00020}  \u{00020}\u{1FB9D}\u{02592}\u{02592}  \u{00020}\u{00020}\u{1FB9E}\u{02592}  \u{02592}\u{1FB9F}\u{00020}\u{00020}  \u{1FB9E}\u{02592}\u{02592}\u{1FB9F}\n\r');
-  term.write('\u{02592}\u{1FB9C}\u{00020}\u{00020}  \u{00020}\u{00020}\u{1FB9D}\u{02592}  \u{00020}\u{1FB9E}\u{02592}\u{02592}  \u{02592}\u{02592}\u{1FB9F}\u{00020}  \u{1FB9D}\u{02592}\u{02592}\u{1FB9C}\n\r');
-  term.write('\u{1FB9C}\u{00020}\u{00020}\u{00020}  \u{00020}\u{00020}\u{00020}\u{1FB9D}  \u{1FB9E}\u{02592}\u{02592}\u{02592}  \u{02592}\u{02592}\u{02592}\u{1FB9F}  \u{00020}\u{1FB9D}\u{1FB9C}\u{00020}\n\r');
-
  term.write('\x1b[0mPowerline alignment tests:\n\r');
  const powerlineLeftChars = ['\u{E0B2}', '\u{E0B3}', '\u{E0B6}', '\u{E0B7}', '\u{E0BA}', '\u{E0BB}', '\u{E0BE}', '\u{E0BF}', '\u{E0C2}', '\u{E0C3}', '\u{E0C5}', '\u{E0C7}', '\u{E0CA}', '\u{E0D4}'];
  const powerlineRightChars = ['\u{E0B0}', '\u{E0B1}', '\u{E0B4}', '\u{E0B5}', '\u{E0B8}', '\u{E0B9}', '\u{E0BC}', '\u{E0BD}', '\u{E0C0}', '\u{E0C1}', '\u{E0C4}', '\u{E0C6}', '\u{E0C8}', '\u{E0D2}', '\u{E0CC}', '\u{E0CD}', '\u{E0CE}', '\u{E0CF}', '\u{E0D0}', '\u{E0D1}'];
@@ -678,6 +751,42 @@ Test BG-colored Erase (BCE):
  term.write(data.split('\n').join('\r\n'));
 }

+function ligaturesTest(term: Terminal): void {
+  term.write([
+    '',
+    '-<< -< -<- <-- <--- <<- <- -> ->> --> ---> ->- >- >>-',
+    '=<< =< =<= <== <=== <<= <= => =>> ==> ===> =>= >= >>=',
+    '<-> <--> <---> <----> <=> <==> <===> <====> :: ::: __',
+    '<~~ </ </> /> ~~> == != /= ~= <> === !== !=== =/= =!=',
+    '<: := *= *+ <* <*> *> <| <|> |> <. <.> .> +* =* =: :>',
+    '(* *) /* */ [| |] {| |} ++ +++ \/ /\ |- -| <!-- <!---',
+    '==== ===== ====== ======= ======== =========',
+    '---- ----- ------ ------- -------- ---------'
+  ].join('\r\n'));
+}
+
+function testWeblinks(term: Terminal): void {
+  const linkExamples = `
+aaa http://example.com aaa http://example.com aaa
+￥￥￥ http://example.com aaa http://example.com aaa
+aaa http://example.com ￥￥￥ http://example.com aaa
+￥￥￥ http://example.com ￥￥￥ http://example.com aaa
+aaa https://ko.wikipedia.org/wiki/위키백과:대문 aaa https://ko.wikipedia.org/wiki/위키백과:대문 aaa
+￥￥￥ https://ko.wikipedia.org/wiki/위키백과:대문 aaa https://ko.wikipedia.org/wiki/위키백과:대문 ￥￥￥
+aaa http://test:password@example.com/some_path aaa
+brackets enclosed:
+aaa [http://example.de] aaa
+aaa (http://example.de) aaa
+aaa <http://example.de> aaa
+aaa {http://example.de} aaa
+ipv6 https://[::1]/with/some?vars=and&a#hash aaa
+stop at final '.': This is a sentence with an url to http://example.com.
+stop at final '?': Is this the right url http://example.com/?
+stop at final '?': Maybe this one http://example.com/with?arguments=false?
+`;
+  term.write(linkExamples.split('\n').join('\r\n'));
+}
+
 function loadTest(term: Terminal, addons: AddonCollection): void {
  const rendererName = addons.webgl.instance ? 'webgl' : 'dom';
  const testData = [];
@@ -745,7 +854,7 @@ function loadTestLongLines(term: Terminal, addons: AddonCollection): void {
 }

 function addDecoration(term: Terminal, dim: number = 1): void {
-  term.options.scrollbar = { ...(term.options.scrollbar ?? {}), width: 14, overviewRuler: term.options.scrollbar?.overviewRuler ?? {} };
+  term.options['overviewRuler'] = { width: 14 };
  const marker = term.registerMarker(1);
  const decoration = term.registerDecoration({
    marker,
@@ -755,14 +864,14 @@ function addDecoration(term: Terminal, dim: number = 1): void {
    foregroundColor: '#00FE00',
    overviewRulerOptions: { color: '#ef292980', position: 'left' }
  });
-  decoration?.onRender((e: HTMLElement) => {
+  decoration.onRender((e: HTMLElement) => {
    e.style.right = '100%';
    e.style.backgroundColor = '#ef292980';
  });
 }

 function addOverviewRuler(term: Terminal): void {
-  term.options.scrollbar = { ...(term.options.scrollbar ?? {}), width: 14, overviewRuler: term.options.scrollbar?.overviewRuler ?? {} };
+  term.options['overviewRuler'] = { width: 14 };
  term.registerDecoration({ marker: term.registerMarker(1), overviewRulerOptions: { color: '#ef2929' } });
  term.registerDecoration({ marker: term.registerMarker(3), overviewRulerOptions: { color: '#8ae234' } });
  term.registerDecoration({ marker: term.registerMarker(5), overviewRulerOptions: { color: '#729fcf' } });
@@ -787,17 +896,133 @@ function decorationStressTest(term: Terminal): void {
    for (const x of [0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95]) {
      for (let y = 0; y < term.buffer.active.length; y++) {
        const cursorOffsetY = y - cursorY;
-        const decoration = term.registerDecoration({
+        decorationStressTestDecorations.push(term.registerDecoration({
          marker: term.registerMarker(cursorOffsetY),
          x,
          width: 4,
          backgroundColor: '#FF0000',
          overviewRulerOptions: { color: '#FF0000' }
-        });
-        if (decoration) {
-          decorationStressTestDecorations.push(decoration);
-        }
+        }));
      }
    }
  }
 }
+
+function initProgress(term: Terminal, addons: AddonCollection): void {
+  const STATES = { 0: 'remove', 1: 'set', 2: 'error', 3: 'indeterminate', 4: 'pause' };
+  const COLORS = { 0: '', 1: 'green', 2: 'red', 3: '', 4: 'yellow' };
+
+  function progressHandler({ state, value }: IProgressState): void {
+    // Simulate windows taskbar hack by windows terminal:
+    // Since the taskbar has no means to indicate error/pause state other than by coloring
+    // the current progress, we move 0 to 10% and distribute higher values in the remaining 90 %
+    // NOTE: This is most likely not what you want to do for other progress indicators,
+    //       that have a proper visual state for error/paused.
+    value = Math.min(10 + value * 0.9, 100);
+    document.getElementById('progress-percent').style.width = `${value}%`;
+    document.getElementById('progress-percent').style.backgroundColor = COLORS[state];
+    document.getElementById('progress-state').innerText = `State: ${STATES[state]}`;
+
+    document.getElementById('progress-percent').style.display = state === 3 ? 'none' : 'block';
+    document.getElementById('progress-indeterminate').style.display = state === 3 ? 'block' : 'none';
+  }
+
+  const progressAddon = addons.progress.instance;
+  progressAddon.onChange(progressHandler);
+
+  // apply initial state once to make it visible on page load
+  const initialProgress = progressAddon.progress;
+  progressHandler(initialProgress);
+
+  document.getElementById('progress-run').addEventListener('click', async () => {
+    term.write('\x1b]9;4;0\x1b\\');
+    for (let i = 0; i <= 100; i += 5) {
+      term.write(`\x1b]9;4;1;${i}\x1b\\`);
+      await new Promise(res => setTimeout(res, 200));
+    }
+  });
+  document.getElementById('progress-0').addEventListener('click', () => term.write('\x1b]9;4;0\x1b\\'));
+  document.getElementById('progress-1').addEventListener('click', () => term.write('\x1b]9;4;1;20\x1b\\'));
+  document.getElementById('progress-2').addEventListener('click', () => term.write('\x1b]9;4;2\x1b\\'));
+  document.getElementById('progress-3').addEventListener('click', () => term.write('\x1b]9;4;3\x1b\\'));
+  document.getElementById('progress-4').addEventListener('click', () => term.write('\x1b]9;4;4\x1b\\'));
+}
+
+function initImageAddonExposed(term: Terminal, addons: AddonCollection): void {
+  const DEFAULT_OPTIONS: IImageAddonOptions = (addons.image.instance as any)._defaultOpts;
+  const limitStorageElement = document.querySelector<HTMLInputElement>('#image-storagelimit');
+  limitStorageElement.valueAsNumber = addons.image.instance.storageLimit;
+  addDomListener(term, limitStorageElement, 'change', () => {
+    try {
+      addons.image.instance.storageLimit = limitStorageElement.valueAsNumber;
+      limitStorageElement.valueAsNumber = addons.image.instance.storageLimit;
+      console.log('changed storageLimit to', addons.image.instance.storageLimit);
+    } catch (e) {
+      limitStorageElement.valueAsNumber = addons.image.instance.storageLimit;
+      console.log('storageLimit at', addons.image.instance.storageLimit);
+      throw e;
+    }
+  });
+  const showPlaceholderElement = document.querySelector<HTMLInputElement>('#image-showplaceholder');
+  showPlaceholderElement.checked = addons.image.instance.showPlaceholder;
+  addDomListener(term, showPlaceholderElement, 'change', () => {
+    addons.image.instance.showPlaceholder = showPlaceholderElement.checked;
+  });
+  const ctorOptionsElement = document.querySelector<HTMLTextAreaElement>('#image-options');
+  ctorOptionsElement.value = JSON.stringify(DEFAULT_OPTIONS, null, 2);
+
+  const sixelDemo = (url: string) => () => fetch(url)
+    .then(resp => resp.arrayBuffer())
+    .then(buffer => {
+      term.write('\r\n');
+      term.write(new Uint8Array(buffer));
+    });
+
+  const iipDemo = (url: string) => () => fetch(url)
+    .then(resp => resp.arrayBuffer())
+    .then(buffer => {
+      const data = new Uint8Array(buffer);
+      let sdata = '';
+      for (let i = 0; i < data.length; ++i) sdata += String.fromCharCode(data[i]);
+      term.write('\r\n');
+      term.write(`\x1b]1337;File=inline=1;size=${data.length}:${btoa(sdata)}\x1b\\`);
+    });
+
+  document.getElementById('image-demo1').addEventListener('click',
+    sixelDemo('https://raw.githubusercontent.com/saitoha/libsixel/master/images/snake.six'));
+  document.getElementById('image-demo2').addEventListener('click',
+    sixelDemo('https://raw.githubusercontent.com/jerch/node-sixel/master/testfiles/test2.sixel'));
+  document.getElementById('image-demo3').addEventListener('click',
+    iipDemo('https://raw.githubusercontent.com/jerch/node-sixel/master/palette.png'));
+
+  // demo for image retrieval API
+  term.element.addEventListener('click', (ev: MouseEvent) => {
+    if (!ev.ctrlKey || !addons.image.instance) return;
+
+    // TODO...
+    // if (ev.altKey) {
+    //   const sel = term.getSelectionPosition();
+    //   if (sel) {
+    //     addons.image.instance
+    //       .extractCanvasAtBufferRange(term.getSelectionPosition())
+    //       ?.toBlob(data => window.open(URL.createObjectURL(data), '_blank'));
+    //     return;
+    //   }
+    // }
+
+    const pos = (term as any)._core._mouseService!.getCoords(ev, (term as any)._core.screenElement!, term.cols, term.rows);
+    const x = pos[0] - 1;
+    const y = pos[1] - 1;
+    const canvas = ev.shiftKey
+      // ctrl+shift+click: get single tile
+      ? addons.image.instance.extractTileAtBufferCell(x, term.buffer.active.viewportY + y)
+      // ctrl+click: get original image
+      : addons.image.instance.getImageAtBufferCell(x, term.buffer.active.viewportY + y);
+    canvas?.toBlob(data => window.open(URL.createObjectURL(data), '_blank'));
+  });
+}
+
+function addDomListener(term: Terminal, element: HTMLElement, type: string, handler: (...args: any[]) => any): void {
+  element.addEventListener(type, handler);
+  (term as any)._core._register({ dispose: () => element.removeEventListener(type, handler) });
+}
@@ -5,12 +5,14 @@

 import { BaseWindow } from './baseWindow';
 import type { IControlWindow } from '../controlBar';
+import type { Terminal } from '@xterm/xterm';

 export class VtWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'vt';
  public readonly label = 'VT';

-  private _container!: HTMLElement;
+  private _container: HTMLElement;
+  private _term: Terminal | undefined;

  public build(container: HTMLElement): void {
    this._container = container;
@@ -63,7 +65,7 @@ export class VtWindow extends BaseWindow implements IControlWindow {
    const writeCsiSplit = writeCsi.split('|');
    const prefix = writeCsiSplit.length === 2 ? writeCsiSplit[0] : '';
    const suffix = writeCsiSplit[writeCsiSplit.length - 1];
-    element.addEventListener('click', () => this._terminal.write(this._csi(`${prefix}${inputs.map(e => e.value).join(';')}${suffix}`)));
+    element.addEventListener('click', () => this._term?.write(this._csi(`${prefix}${inputs.map(e => e.value).join(';')}${suffix}`)));

    const desc = document.createElement('span');
    desc.textContent = description;
@@ -10,7 +10,7 @@ export class WebglWindow extends BaseWindow implements IControlWindow {
  public readonly id = 'addon-webgl';
  public readonly label = 'webgl';

-  private _textureAtlasContainer!: HTMLElement;
+  private _textureAtlasContainer: HTMLElement;

  public build(container: HTMLElement): void {
    const zoomCheckbox = document.createElement('input');
@@ -6,7 +6,6 @@
    "rootDir": ".",
    "sourceMap": true,
    "baseUrl": ".",
-    "strict": true,
    "paths": {
      "@xterm/addon-attach": ["../../addons/addon-attach"],
      "@xterm/addon-clipboard": ["../../addons/addon-clipboard"],
@@ -33,7 +33,6 @@ body {
    padding: 4px 10px;
    cursor: pointer;
    font-size: 12px;
-    outline-offset: -1px;
 }
 .banner-tabs button:hover {
    background: rgba(255,255,255,0.1);
@@ -23,6 +23,6 @@
      <div id="sidebar" class="grid">
      </div>
    </div>
-      <script src="dist/client-bundle.js" defer ></script>
+      <script src="dist/client-bundle.mjs" type="module" defer ></script>
    </body>
 </html>
@@ -46,7 +46,6 @@ function startServer(): void {
  });

  app.use('/fonts', express.static(demoRoot + '/fonts'));
-  app.use('/vendor/ghostty-wasm', express.static(demoRoot + '/../vendor/ghostty-wasm'));

  app.use('/dist', express.static(demoRoot + '/dist'));
  app.use('/src', express.static(demoRoot + '/src'));
@@ -18,6 +18,6 @@
  </head>
  <body id="test">
    <div id="terminal-container"></div>
-    <script src="/dist/client-bundle.js" defer></script>
+    <script src="/dist/client-bundle.mjs" type="module" defer></script>
  </body>
 </html>
@@ -10,6 +10,7 @@ export default tseslint.config(
  {
    ignores: [
      'addons/*/src/third-party/*.ts',
+      'src/vs/*',
      '**/out/*',
      '**/out-test/*',
      '**/out-esbuild/*',
@@ -34,7 +35,6 @@ export default tseslint.config(
      }
    },
    rules: {
-      '@stylistic/comma-spacing': ['warn', { before: false, after: true }],
      '@stylistic/indent': ['warn', 2],
      '@stylistic/semi': ['warn', 'always'],
      '@stylistic/quotes': ['warn', 'single', { allowTemplateLiterals: true }],
@@ -66,7 +66,6 @@ export default tseslint.config(
      ],
      '@typescript-eslint/no-confusing-void-expression': ['warn', { ignoreArrowShorthand: true }],
      '@typescript-eslint/no-useless-constructor': 'warn',
-      '@typescript-eslint/prefer-nullish-coalescing': ['warn', { ignorePrimitives: true }],
      '@typescript-eslint/prefer-namespace-keyword': 'warn',
      '@typescript-eslint/no-unused-vars': ['warn', { vars: 'all', args: 'none' }],
      '@typescript-eslint/no-require-imports': 'off',
@@ -141,12 +140,5 @@ export default tseslint.config(
      '@typescript-eslint/explicit-function-return-type': 'off',
      '@typescript-eslint/explicit-member-accessibility': 'off'
    }
-  },
-  {
-    // Disable prefer-nullish-coalescing for files without strictNullChecks
-    files: ['demo/**/*.ts', '**/*.benchmark.ts'],
-    rules: {
-      '@typescript-eslint/prefer-nullish-coalescing': 'off'
-    }
  }
 );
@@ -1,7 +1,7 @@
 {
 "name": "@xterm/headless",
 "description": "A headless terminal component that runs in Node.js",
- "version": "6.0.0",
+ "version": "5.5.0",
 "main": "lib-headless/xterm-headless.js",
 "module": "lib-headless/xterm-headless.mjs",
 "types": "typings/xterm-headless.d.ts",
@@ -41,7 +41,7 @@
        "jsdom": "^27.3.0",
        "mocha": "^10.1.0",
        "mustache": "^4.2.0",
-        "node-pty": "^1.2.0-beta.9",
+        "node-pty": "1.1.0-beta19",
        "nyc": "^17.1.0",
        "source-map-loader": "^3.0.0",
        "source-map-support": "^0.5.20",
@@ -6016,12 +6016,11 @@
      }
    },
    "node_modules/node-pty": {
-      "version": "1.2.0-beta.9",
-      "resolved": "https://registry.npmjs.org/node-pty/-/node-pty-1.2.0-beta.9.tgz",
-      "integrity": "sha512-XR3x/4OQZ7DlceespOQ99kk9jZHwmO78RuEIZtGsSPdsDi11s79VcK04aqcaK3x09Y6ORJM/KBz/oQ/p+WGRLg==",
+      "version": "1.1.0-beta19",
+      "resolved": "https://registry.npmjs.org/node-pty/-/node-pty-1.1.0-beta19.tgz",
+      "integrity": "sha512-/p4Zu56EYDdXjjaLWzrIlFyrBnND11LQGP0/L6GEVGURfCNkAlHc3Twg/2I4NPxghimHXgvDlwp7Z2GtvDIh8A==",
      "dev": true,
      "hasInstallScript": true,
-      "license": "MIT",
      "dependencies": {
        "node-addon-api": "^7.1.0"
      }
@@ -45,20 +45,18 @@
    "esbuild-demo-client-watch": "node bin/esbuild.mjs --demo-client --watch",
    "esbuild-demo-server": "node bin/esbuild.mjs --demo-server",
    "esbuild-demo-server-watch": "node bin/esbuild.mjs --demo-server --watch",
-    "ghostty-wasm": "node bin/build_ghostty_wasm.mjs",
    "test": "npm run test-unit",
    "posttest": "npm run lint",
-    "lint": "eslint --max-warnings 0 src/ addons/ demo/ test/",
+    "lint": "eslint --max-warnings 0 src/ addons/ demo/",
    "lint-changes": "node ./bin/lint_changes.js",
    "lint-changes-fix": "node ./bin/lint_changes.js --fix",
-    "lint-fix": "eslint --fix src/ addons/ demo/ test/",
+    "lint-fix": "eslint --fix src/ addons/ demo/",
    "lint-api": "eslint --config eslint.config.typings.mjs --max-warnings 0 typings/",
    "test-unit": "node ./bin/test_unit.js",
-    "test-unit-slow-tests": "npm run test-unit | grep \"ms)\"",
    "test-unit-coverage": "node ./bin/test_unit.js --coverage",
    "test-unit-dev": "cross-env NODE_PATH='./out' mocha",
    "test-integration": "node ./bin/test_integration.js --workers=75%",
-    "test-integration-chromium": "node ./bin/test_integration.js --workers=75% \"--project=Chromium\"",
+    "test-integration-chromium": "node ./bin/test_integration.js --workers=75% \"--project=ChromeStable\"",
    "test-integration-firefox": "node ./bin/test_integration.js --workers=75% \"--project=FirefoxStable\"",
    "test-integration-webkit": "node ./bin/test_integration.js --workers=75% \"--project=WebKit\"",
    "test-integration-debug": "node ./bin/test_integration.js  --workers=1 --headed --timeout=30000",
@@ -105,7 +103,7 @@
    "jsdom": "^27.3.0",
    "mocha": "^10.1.0",
    "mustache": "^4.2.0",
-    "node-pty": "^1.2.0-beta.9",
+    "node-pty": "1.1.0-beta19",
    "nyc": "^17.1.0",
    "source-map-loader": "^3.0.0",
    "source-map-support": "^0.5.20",
@@ -6,11 +6,11 @@
 import * as Strings from 'browser/LocalizableStrings';
 import { ITerminal, IRenderDebouncer } from 'browser/Types';
 import { TimeBasedDebouncer } from 'browser/TimeBasedDebouncer';
-import { Disposable, toDisposable } from 'common/Lifecycle';
+import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
 import { ICoreBrowserService, IRenderService } from 'browser/services/Services';
 import { IBuffer } from 'common/buffer/Types';
 import { IInstantiationService } from 'common/services/Services';
-import { addDisposableListener } from 'browser/Dom';
+import { addDisposableListener } from 'vs/base/browser/dom';

 const MAX_ROWS_TO_READ = 20;

@@ -28,7 +28,7 @@ import { OscLinkProvider } from 'browser/OscLinkProvider';
 import { CharacterJoinerHandler, CustomKeyEventHandler, CustomWheelEventHandler, IBrowser, IBufferRange, ICompositionHelper, ILinkifier2, ITerminal } from 'browser/Types';
 import { Viewport } from 'browser/Viewport';
 import { BufferDecorationRenderer } from 'browser/decorations/BufferDecorationRenderer';
-import { OverviewRulerRenderer } from 'browser/decorations/OverviewRulerRenderer';
+import type { OverviewRulerRenderer } from 'browser/decorations/OverviewRulerRenderer';
 import { CompositionHelper } from 'browser/input/CompositionHelper';
 import { DomRenderer } from 'browser/renderer/dom/DomRenderer';
 import { IRenderer } from 'browser/renderer/shared/Types';
@@ -42,22 +42,44 @@ import { SelectionService } from 'browser/services/SelectionService';
 import { ICharSizeService, ICharacterJoinerService, ICoreBrowserService, IKeyboardService, ILinkProviderService, IMouseService, IRenderService, ISelectionService, IThemeService } from 'browser/services/Services';
 import { ThemeService } from 'browser/services/ThemeService';
 import { KeyboardService } from 'browser/services/KeyboardService';
-import { channels, color, rgb } from 'common/Color';
+import { channels, color } from 'common/Color';
 import { CoreTerminal } from 'common/CoreTerminal';
 import * as Browser from 'common/Platform';
 import { ColorRequestType, CoreMouseAction, CoreMouseButton, CoreMouseEventType, IColorEvent, ITerminalOptions, KeyboardResultType, SpecialColorIndex } from 'common/Types';
 import { DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';
 import { IBuffer } from 'common/buffer/Types';
-import { C0, C1ESCAPED } from 'common/data/EscapeSequences';
+import { C0, C1_ESCAPED } from 'common/data/EscapeSequences';
 import { toRgbString } from 'common/input/XParseColor';
 import { DecorationService } from 'common/services/DecorationService';
 import { IDecorationService } from 'common/services/Services';
 import { WindowsOptionsReportType } from '../common/InputHandler';
-import { AccessibilityManager } from './AccessibilityManager';
+import type { AccessibilityManager } from './AccessibilityManager';
 import { Linkifier } from './Linkifier';
-import { Emitter, EventUtils, type IEvent } from 'common/Event';
-import { addDisposableListener } from 'browser/Dom';
-import { MutableDisposable, toDisposable } from 'common/Lifecycle';
+import { Emitter, Event } from 'vs/base/common/event';
+import { addDisposableListener } from 'vs/base/browser/dom';
+import { MutableDisposable, toDisposable } from 'vs/base/common/lifecycle';
+
+/**
+ * Lazily loaded AccessibilityManager module.
+ */
+let accessibilityManagerModule: Promise<typeof import('./AccessibilityManager')> | undefined;
+function loadAccessibilityManager(): Promise<typeof import('./AccessibilityManager')> {
+  if (!accessibilityManagerModule) {
+    accessibilityManagerModule = import('./AccessibilityManager');
+  }
+  return accessibilityManagerModule;
+}
+
+/**
+ * Lazily loaded OverviewRulerRenderer module.
+ */
+let overviewRulerRendererModule: Promise<typeof import('browser/decorations/OverviewRulerRenderer')> | undefined;
+function loadOverviewRulerRenderer(): Promise<typeof import('browser/decorations/OverviewRulerRenderer')> {
+  if (!overviewRulerRendererModule) {
+    overviewRulerRendererModule = import('browser/decorations/OverviewRulerRenderer');
+  }
+  return overviewRulerRendererModule;
+}

 export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
  public textarea: HTMLTextAreaElement | undefined;
@@ -135,15 +157,15 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
  public readonly onBell = this._onBell.event;

  private _onFocus = this._register(new Emitter<void>());
-  public get onFocus(): IEvent<void> { return this._onFocus.event; }
+  public get onFocus(): Event<void> { return this._onFocus.event; }
  private _onBlur = this._register(new Emitter<void>());
-  public get onBlur(): IEvent<void> { return this._onBlur.event; }
+  public get onBlur(): Event<void> { return this._onBlur.event; }
  private _onA11yCharEmitter = this._register(new Emitter<string>());
-  public get onA11yChar(): IEvent<string> { return this._onA11yCharEmitter.event; }
+  public get onA11yChar(): Event<string> { return this._onA11yCharEmitter.event; }
  private _onA11yTabEmitter = this._register(new Emitter<number>());
-  public get onA11yTab(): IEvent<number> { return this._onA11yTabEmitter.event; }
+  public get onA11yTab(): Event<number> { return this._onA11yTabEmitter.event; }
  private _onWillOpen = this._register(new Emitter<HTMLElement>());
-  public get onWillOpen(): IEvent<HTMLElement> { return this._onWillOpen.event; }
+  public get onWillOpen(): Event<HTMLElement> { return this._onWillOpen.event; }
  private readonly _onDimensionsChange = this._register(new Emitter<IRenderDimensionsApi>());
  public readonly onDimensionsChange = this._onDimensionsChange.event;

@@ -187,10 +209,10 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
    this._register(this._inputHandler.onRequestReset(() => this.reset()));
    this._register(this._inputHandler.onRequestWindowsOptionsReport(type => this._reportWindowsOptions(type)));
    this._register(this._inputHandler.onColor((event) => this._handleColorEvent(event)));
-    this._register(EventUtils.forward(this._inputHandler.onCursorMove, this._onCursorMove));
-    this._register(EventUtils.forward(this._inputHandler.onTitleChange, this._onTitleChange));
-    this._register(EventUtils.forward(this._inputHandler.onA11yChar, this._onA11yCharEmitter));
-    this._register(EventUtils.forward(this._inputHandler.onA11yTab, this._onA11yTabEmitter));
+    this._register(Event.forward(this._inputHandler.onCursorMove, this._onCursorMove));
+    this._register(Event.forward(this._inputHandler.onTitleChange, this._onTitleChange));
+    this._register(Event.forward(this._inputHandler.onA11yChar, this._onA11yCharEmitter));
+    this._register(Event.forward(this._inputHandler.onA11yTab, this._onA11yTabEmitter));

    // Setup listeners
    this._register(this._bufferService.onResize(e => this._afterResize(e.cols, e.rows)));
@@ -235,7 +257,7 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
          const colorRgb = color.toColorRGB(acc === 'ansi'
            ? this._themeService.colors.ansi[req.index]
            : this._themeService.colors[acc]);
-          this.coreService.triggerDataEvent(`${C0.ESC}]${ident};${toRgbString(colorRgb)}${C1ESCAPED.ST}`);
+          this.coreService.triggerDataEvent(`${C0.ESC}]${ident};${toRgbString(colorRgb)}${C1_ESCAPED.ST}`);
          break;
        case ColorRequestType.SET:
          if (acc === 'ansi') {
@@ -252,20 +274,6 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
    }
  }

-  /**
-   * Reports the current color scheme (dark or light) based on the relative luminance
-   * of the background and foreground theme colors.
-   * Sends CSI ? 997 ; 1 n for dark mode or CSI ? 997 ; 2 n for light mode.
-   */
-  private _reportColorScheme(): void {
-    if (!this._themeService) return;
-    const bgLuminance = rgb.relativeLuminance(this._themeService.colors.background.rgba >> 8);
-    const fgLuminance = rgb.relativeLuminance(this._themeService.colors.foreground.rgba >> 8);
-    // Dark mode = background is darker than foreground (lower luminance)
-    const colorSchemeMode = bgLuminance < fgLuminance ? 1 : 2;
-    this.coreService.triggerDataEvent(`${C0.ESC}[?997;${colorSchemeMode}n`);
-  }
-
  protected _setup(): void {
    super._setup();

@@ -291,7 +299,14 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
  private _handleScreenReaderModeOptionChange(value: boolean): void {
    if (value) {
      if (!this._accessibilityManager.value && this._renderService) {
-        this._accessibilityManager.value = this._instantiationService.createInstance(AccessibilityManager, this);
+        loadAccessibilityManager().then(module => {
+          // Check again after async load in case option changed
+          if (this.options.screenReaderMode && !this._accessibilityManager.value && this._renderService) {
+            this._accessibilityManager.value = this._instantiationService.createInstance(module.AccessibilityManager, this);
+          }
+        }).catch(() => {
+          // Failed to load accessibility manager module
+        });
      }
    } else {
      this._accessibilityManager.clear();
@@ -509,16 +524,6 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
    this._themeService = this._instantiationService.createInstance(ThemeService);
    this._instantiationService.setService(IThemeService, this._themeService);

-    // CSI ? 996 n - color scheme query (https://contour-terminal.org/vt-extensions/color-palette-update-notifications/)
-    this._register(this._inputHandler.onRequestColorSchemeQuery(() => this._reportColorScheme()));
-
-    // Emit unsolicited color scheme notification on theme change when DECSET 2031 is enabled
-    this._register(this._themeService.onChangeColors(() => {
-      if (this.coreService.decPrivateModes.colorSchemeUpdates) {
-        this._reportColorScheme();
-      }
-    }));
-
    this._characterJoinerService = this._instantiationService.createInstance(CharacterJoinerService);
    this._instantiationService.setService(ICharacterJoinerService, this._characterJoinerService);

@@ -590,7 +595,7 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
      this.textarea!.focus();
      this.textarea!.select();
    }));
-    this._register(EventUtils.any(
+    this._register(Event.any(
      this._onScroll.event,
      this._inputHandler.onScroll
    )(() => {
@@ -612,19 +617,34 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
    if (this.options.screenReaderMode) {
      // Note that this must be done *after* the renderer is created in order to
      // ensure the correct order of the dprchange event
-      this._accessibilityManager.value = this._instantiationService.createInstance(AccessibilityManager, this);
+      loadAccessibilityManager().then(module => {
+        if (this.options.screenReaderMode && !this._accessibilityManager.value && this._renderService) {
+          this._accessibilityManager.value = this._instantiationService.createInstance(module.AccessibilityManager, this);
+        }
+      }).catch(() => {
+        // Failed to load accessibility manager module
+      });
    }
    this._register(this.optionsService.onSpecificOptionChange('screenReaderMode', e => this._handleScreenReaderModeOptionChange(e)));

-    const showScrollbar = this.options.scrollbar?.showScrollbar ?? true;
-    const overviewRulerWidth = this.options.scrollbar?.width;
-    if (showScrollbar && overviewRulerWidth) {
-      this._overviewRulerRenderer = this._register(this._instantiationService.createInstance(OverviewRulerRenderer, this._viewportElement, this.screenElement));
+    if (this.options.overviewRuler.width) {
+      loadOverviewRulerRenderer().then(module => {
+        if (this.options.overviewRuler.width && !this._overviewRulerRenderer && this._viewportElement && this.screenElement) {
+          this._overviewRulerRenderer = this._register(this._instantiationService.createInstance(module.OverviewRulerRenderer, this._viewportElement, this.screenElement));
+        }
+      }).catch(() => {
+        // Failed to load overview ruler renderer module
+      });
    }
-    this.optionsService.onSpecificOptionChange('scrollbar', value => {
-      const shouldShow = (value?.showScrollbar ?? true) && !!value?.width;
-      if (!this._overviewRulerRenderer && shouldShow && this._viewportElement && this.screenElement) {
-        this._overviewRulerRenderer = this._register(this._instantiationService.createInstance(OverviewRulerRenderer, this._viewportElement, this.screenElement));
+    this.optionsService.onSpecificOptionChange('overviewRuler', value => {
+      if (!this._overviewRulerRenderer && value && this._viewportElement && this.screenElement) {
+        loadOverviewRulerRenderer().then(module => {
+          if (!this._overviewRulerRenderer && this.options.overviewRuler.width && this._viewportElement && this.screenElement) {
+            this._overviewRulerRenderer = this._register(this._instantiationService.createInstance(module.OverviewRulerRenderer, this._viewportElement, this.screenElement));
+          }
+        }).catch(() => {
+          // Failed to load overview ruler renderer module
+        });
      }
    });
    // Measure the character size
@@ -766,12 +786,11 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
            this._document!.removeEventListener('mousemove', requestedEvents.mousedrag);
          }
        }
+        return this.cancel(ev);
      },
      wheel: (ev: WheelEvent) => {
        sendEvent(ev);
-        ev.preventDefault();
-        ev.stopPropagation();
-        return false;
+        return this.cancel(ev, true);
      },
      mousedrag: (ev: MouseEvent) => {
        // deal only with move while a button is held
@@ -821,15 +840,15 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
      if (!(events & CoreMouseEventType.UP)) {
        this._document!.removeEventListener('mouseup', requestedEvents.mouseup!);
        requestedEvents.mouseup = null;
-      } else {
-        requestedEvents.mouseup ??= eventListeners.mouseup;
+      } else if (!requestedEvents.mouseup) {
+        requestedEvents.mouseup = eventListeners.mouseup;
      }

      if (!(events & CoreMouseEventType.DRAG)) {
        this._document!.removeEventListener('mousemove', requestedEvents.mousedrag!);
        requestedEvents.mousedrag = null;
-      } else {
-        requestedEvents.mousedrag ??= eventListeners.mousedrag;
+      } else if (!requestedEvents.mousedrag) {
+        requestedEvents.mousedrag = eventListeners.mousedrag;
      }
    }));
    // force initial onProtocolChange so we dont miss early mouse requests
@@ -871,6 +890,8 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
      if (requestedEvents.mousedrag) {
        this._document!.addEventListener('mousemove', requestedEvents.mousedrag);
      }
+
+      return this.cancel(ev);
    }));

    this._register(addDisposableListener(el, 'wheel', (ev: WheelEvent) => {
@@ -901,17 +922,13 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
          self._coreBrowserService?.dpr
        );
        if (lines === 0) {
-          ev.preventDefault();
-          ev.stopPropagation();
-          return false;
+          return this.cancel(ev, true);
        }

        // Construct and send sequences
        const sequence = C0.ESC + (this.coreService.decPrivateModes.applicationCursorKeys ? 'O' : '[') + (ev.deltaY < 0 ? 'A' : 'B');
        this.coreService.triggerDataEvent(sequence, true);
-        ev.preventDefault();
-        ev.stopPropagation();
-        return false;
+        return this.cancel(ev, true);
      }
    }, { passive: false }));
  }
@@ -1121,9 +1138,7 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
    if (result.type === KeyboardResultType.PAGE_DOWN || result.type === KeyboardResultType.PAGE_UP) {
      const scrollCount = this.rows - 1;
      this.scrollLines(result.type === KeyboardResultType.PAGE_UP ? -scrollCount : scrollCount);
-      event.preventDefault();
-      event.stopPropagation();
-      return false;
+      return this.cancel(event, true);
    }

    if (result.type === KeyboardResultType.SELECT_ALL) {
@@ -1136,8 +1151,7 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {

    if (result.cancel) {
      // The event is canceled at the end already, is this necessary?
-      event.preventDefault();
-      event.stopPropagation();
+      this.cancel(event, true);
    }

    if (!result.key) {
@@ -1165,19 +1179,16 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
      this.textarea!.value = '';
    }

-    const wasModifierOnly = this._keyboardService.useWin32InputMode && wasModifierKeyOnlyEvent(event);
    this._onKey.fire({ key: result.key, domEvent: event });
    this._showCursor();
-    this.coreService.triggerDataEvent(result.key, !wasModifierOnly);
+    this.coreService.triggerDataEvent(result.key, true);

    // Cancel events when not in screen reader mode so events don't get bubbled up and handled by
    // other listeners. When screen reader mode is enabled, we don't cancel them (unless ctrl or alt
    // is also depressed) so that the cursor textarea can be updated, which triggers the screen
    // reader to read it.
    if (!this.optionsService.rawOptions.screenReaderMode || event.altKey || event.ctrlKey) {
-      event.preventDefault();
-      event.stopPropagation();
-      return false;
+      return this.cancel(event, true);
    }

    this._keyDownHandled = true;
@@ -1211,8 +1222,7 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
    // Handle key release for Kitty keyboard protocol
    const result = this._keyboardService.evaluateKeyUp(ev);
    if (result?.key) {
-      const wasModifierOnly = this._keyboardService.useWin32InputMode && wasModifierKeyOnlyEvent(ev);
-      this.coreService.triggerDataEvent(result.key, !wasModifierOnly);
+      this.coreService.triggerDataEvent(result.key, true);
    }

    this.updateCursorStyle(ev);
@@ -1238,6 +1248,8 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
      return false;
    }

+    this.cancel(ev);
+
    if (ev.charCode) {
      key = ev.charCode;
    } else if (ev.which === null || ev.which === undefined) {
@@ -1290,6 +1302,8 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {

      const text = ev.data;
      this.coreService.triggerDataEvent(text, true);
+
+      this.cancel(ev);
      return true;
    }

@@ -1401,6 +1415,15 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
    }
  }

+  // TODO: Remove cancel function and cancelEvents option
+  public cancel(ev: MouseEvent | WheelEvent | KeyboardEvent | InputEvent, force?: boolean): boolean | undefined {
+    if (!this.options.cancelEvents && !force) {
+      return;
+    }
+    ev.preventDefault();
+    ev.stopPropagation();
+    return false;
+  }
 }

 /**
@@ -1410,10 +1433,5 @@ export class CoreBrowserTerminal extends CoreTerminal implements ITerminal {
 function wasModifierKeyOnlyEvent(ev: KeyboardEvent): boolean {
  return ev.keyCode === 16 || // Shift
    ev.keyCode === 17 || // Ctrl
-    ev.keyCode === 18 || // Alt
-    ev.keyCode === 91 || // Meta (Left)
-    ev.keyCode === 92 || // Meta (Right)
-    ev.keyCode === 93 || // Meta (Menu)
-    ev.keyCode === 224 || // Meta (Firefox)
-    ev.key === 'Meta';
+    ev.keyCode === 18; // Alt
 }
@@ -1,178 +0,0 @@
-/**
- * Copyright (c) 2026 The xterm.js authors. All rights reserved.
- * @license MIT
- *
- * Minimal DOM helpers for xterm.js browser code.
- */
-
-import { IntervalTimer } from 'common/Async';
-import { IDisposable } from 'common/Lifecycle';
-
-export function getWindow(e: Node | UIEvent | undefined | null): Window {
-  const candidateNode = e as Node | undefined | null;
-  if (candidateNode?.ownerDocument?.defaultView) {
-    return candidateNode.ownerDocument.defaultView;
-  }
-
-  const candidateEvent = e as UIEvent | undefined | null;
-  if (candidateEvent?.view) {
-    return candidateEvent.view;
-  }
-
-  return window;
-}
-
-class DomListener implements IDisposable {
-  private _handler: ((e: any) => void) | null;
-  private _node: EventTarget | null;
-  private readonly _type: string;
-  private readonly _options: boolean | AddEventListenerOptions | undefined;
-
-  constructor(node: EventTarget, type: string, handler: (e: any) => void, options?: boolean | AddEventListenerOptions) {
-    this._node = node;
-    this._type = type;
-    this._handler = handler;
-    this._options = options;
-    node.addEventListener(type, handler, options);
-  }
-
-  public dispose(): void {
-    if (!this._node || !this._handler) {
-      return;
-    }
-    this._node.removeEventListener(this._type, this._handler, this._options);
-    this._node = null;
-    this._handler = null;
-  }
-}
-
-export function addDisposableListener<K extends keyof GlobalEventHandlersEventMap>(node: EventTarget, type: K, handler: (event: GlobalEventHandlersEventMap[K]) => void, useCapture?: boolean): IDisposable;
-export function addDisposableListener(node: EventTarget, type: string, handler: (event: any) => void, useCapture?: boolean): IDisposable;
-export function addDisposableListener(node: EventTarget, type: string, handler: (event: any) => void, options: AddEventListenerOptions): IDisposable;
-export function addDisposableListener(node: EventTarget, type: string, handler: (event: any) => void, useCaptureOrOptions?: boolean | AddEventListenerOptions): IDisposable {
-  return new DomListener(node, type, handler, useCaptureOrOptions);
-}
-
-export function addStandardDisposableListener(node: HTMLElement, type: string, handler: (event: any) => void, useCapture?: boolean): IDisposable {
-  return addDisposableListener(node, type, handler, useCapture);
-}
-
-export const eventType = {
-  CLICK: 'click',
-  MOUSE_DOWN: 'mousedown',
-  MOUSE_OVER: 'mouseover',
-  MOUSE_LEAVE: 'mouseleave',
-  KEY_DOWN: 'keydown',
-  KEY_UP: 'keyup',
-  INPUT: 'input',
-  BLUR: 'blur',
-  FOCUS: 'focus',
-  CHANGE: 'change',
-  POINTER_DOWN: 'pointerdown',
-  POINTER_MOVE: 'pointermove',
-  POINTER_UP: 'pointerup',
-  MOUSE_WHEEL: 'wheel',
-  WHEEL: 'wheel'
-} as const;
-
-export function getDomNodePagePosition(domNode: HTMLElement): { left: number, top: number, width: number, height: number } {
-  const bb = domNode.getBoundingClientRect();
-  const win = getWindow(domNode);
-  return {
-    left: bb.left + win.scrollX,
-    top: bb.top + win.scrollY,
-    width: bb.width,
-    height: bb.height
-  };
-}
-
-class AnimationFrameQueueItem implements IDisposable {
-  private _canceled = false;
-
-  constructor(private readonly _runner: () => void, public priority: number) {
-  }
-
-  public dispose(): void {
-    this._canceled = true;
-  }
-
-  public execute(): void {
-    if (this._canceled) {
-      return;
-    }
-    try {
-      this._runner();
-    } catch (e) {
-      console.error(e);
-    }
-  }
-
-  public static sort(a: AnimationFrameQueueItem, b: AnimationFrameQueueItem): number {
-    return b.priority - a.priority;
-  }
-}
-
-interface IWindowAnimationFrameState {
-  next: AnimationFrameQueueItem[];
-  current: AnimationFrameQueueItem[];
-  animFrameRequested: boolean;
-  inAnimationFrameRunner: boolean;
-}
-
-const animationFrameState = new Map<Window, IWindowAnimationFrameState>();
-
-function getAnimationFrameState(targetWindow: Window): IWindowAnimationFrameState {
-  let state = animationFrameState.get(targetWindow);
-  if (!state) {
-    state = {
-      next: [],
-      current: [],
-      animFrameRequested: false,
-      inAnimationFrameRunner: false
-    };
-    animationFrameState.set(targetWindow, state);
-  }
-  return state;
-}
-
-function animationFrameRunner(targetWindow: Window): void {
-  const state = getAnimationFrameState(targetWindow);
-  state.animFrameRequested = false;
-
-  state.current = state.next;
-  state.next = [];
-
-  state.inAnimationFrameRunner = true;
-  while (state.current.length > 0) {
-    state.current.sort(AnimationFrameQueueItem.sort);
-    const top = state.current.shift()!;
-    top.execute();
-  }
-  state.inAnimationFrameRunner = false;
-}
-
-export function scheduleAtNextAnimationFrame(targetWindow: Window, runner: () => void, priority: number = 0): IDisposable {
-  const state = getAnimationFrameState(targetWindow);
-  const item = new AnimationFrameQueueItem(runner, priority);
-  state.next.push(item);
-
-  if (!state.animFrameRequested) {
-    state.animFrameRequested = true;
-    targetWindow.requestAnimationFrame(() => animationFrameRunner(targetWindow));
-  }
-
-  return item;
-}
-
-export class WindowIntervalTimer extends IntervalTimer {
-  private readonly _defaultTarget?: Window;
-
-  constructor(node?: Node) {
-    super();
-    this._defaultTarget = node ? getWindow(node) : undefined;
-  }
-
-  public cancelAndSet(runner: () => void, interval: number, targetWindow?: Window): void {
-    super.cancelAndSet(runner, interval, targetWindow ?? this._defaultTarget ?? window);
-  }
-}
@@ -4,12 +4,12 @@
 */

 import { IBufferCellPosition, ILink, ILinkDecorations, ILinkWithState, ILinkifier2, ILinkifierEvent } from 'browser/Types';
-import { Disposable, dispose, toDisposable } from 'common/Lifecycle';
+import { Disposable, dispose, toDisposable } from 'vs/base/common/lifecycle';
 import { IDisposable } from 'common/Types';
 import { IBufferService } from 'common/services/Services';
 import { ILinkProviderService, IMouseService, IRenderService } from './services/Services';
-import { Emitter } from 'common/Event';
-import { addDisposableListener } from 'browser/Dom';
+import { Emitter } from 'vs/base/common/event';
+import { addDisposableListener } from 'vs/base/browser/dom';

 export class Linkifier extends Disposable implements ILinkifier2 {
  public get currentLink(): ILinkWithState | undefined { return this._currentLink; }
@@ -9,8 +9,6 @@ import { CellData } from 'common/buffer/CellData';
 import { IBufferService, IOptionsService, IOscLinkService } from 'common/services/Services';

 export class OscLinkProvider implements ILinkProvider {
-  private readonly _workCell = new CellData();
-
  constructor(
    @IBufferService private readonly _bufferService: IBufferService,
    @IOptionsService private readonly _optionsService: IOptionsService,
@@ -27,7 +25,7 @@ export class OscLinkProvider implements ILinkProvider {

    const result: ILink[] = [];
    const linkHandler = this._optionsService.rawOptions.linkHandler;
-    const cell = this._workCell;
+    const cell = new CellData();
    const lineLength = line.getTrimmedLength();
    let currentLinkId = -1;
    let currentStart = -1;
@@ -40,8 +40,8 @@ export class RenderDebouncer implements IRenderDebouncerWithCallback {
  public refresh(rowStart: number | undefined, rowEnd: number | undefined, rowCount: number): void {
    this._rowCount = rowCount;
    // Get the min/max row start/end for the arg values
-    rowStart = rowStart ?? 0;
-    rowEnd = rowEnd ?? this._rowCount - 1;
+    rowStart = rowStart !== undefined ? rowStart : 0;
+    rowEnd = rowEnd !== undefined ? rowEnd : this._rowCount - 1;
    // Set the properties to the updated values
    this._rowStart = this._rowStart !== undefined ? Math.min(this._rowStart, rowStart) : rowStart;
    this._rowEnd = this._rowEnd !== undefined ? Math.max(this._rowEnd, rowEnd) : rowEnd;
@@ -17,21 +17,6 @@ const INIT_ROWS = 24;
 // grab wcwidth from mock unicode service (hardcoded to V6)
 const wcwidth = (new MockUnicodeService()).wcwidth;

-function assertLineEqual(actual: any, expected: any): void {
-  assert.isOk(actual);
-  assert.isOk(expected);
-  assert.equal(actual.length, expected.length);
-  assert.equal(actual.isWrapped, expected.isWrapped);
-  const actualCell = new CellData();
-  const expectedCell = new CellData();
-  for (let i = 0; i < actual.length; i++) {
-    assert.deepEqual(
-      actual.loadCell(i, actualCell).getAsCharData(),
-      expected.loadCell(i, expectedCell).getAsCharData()
-    );
-  }
-}
-
 describe('Terminal', () => {
  let term: TestTerminal;
  const termOptions = {
@@ -198,14 +183,16 @@ describe('Terminal', () => {
      assert.equal(term.buffer.ybase, 0);
      assert.equal(term.buffer.ydisp, 0);
      assert.equal(term.buffer.lines.length, term.rows);
-      assertLineEqual(term.buffer.lines.get(0), promptLine);
+      assert.deepEqual(term.buffer.lines.get(0), promptLine);
      for (let i = 1; i < term.rows; i++) {
-        assertLineEqual(term.buffer.lines.get(i), term.buffer.getBlankLine(DEFAULT_ATTR_DATA));
+        assert.deepEqual(term.buffer.lines.get(i), term.buffer.getBlankLine(DEFAULT_ATTR_DATA));
      }
    });
    it('should clear a buffer larger than rows', async () => {
      // Fill the buffer with dummy rows
-      await term.writeP('test\n'.repeat(term.rows * 2));
+      for (let i = 0; i < term.rows * 2; i++) {
+        await term.writeP('test\n');
+      }

      const promptLine = term.buffer.lines.get(term.buffer.ybase + term.buffer.y);
      term.clear();
@@ -213,9 +200,9 @@ describe('Terminal', () => {
      assert.equal(term.buffer.ybase, 0);
      assert.equal(term.buffer.ydisp, 0);
      assert.equal(term.buffer.lines.length, term.rows);
-      assertLineEqual(term.buffer.lines.get(0), promptLine);
+      assert.deepEqual(term.buffer.lines.get(0), promptLine);
      for (let i = 1; i < term.rows; i++) {
-        assertLineEqual(term.buffer.lines.get(i), term.buffer.getBlankLine(DEFAULT_ATTR_DATA));
+        assert.deepEqual(term.buffer.lines.get(i), term.buffer.getBlankLine(DEFAULT_ATTR_DATA));
      }
    });
    it('should not break the prompt when cleared twice', () => {
@@ -226,9 +213,9 @@ describe('Terminal', () => {
      assert.equal(term.buffer.ybase, 0);
      assert.equal(term.buffer.ydisp, 0);
      assert.equal(term.buffer.lines.length, term.rows);
-      assertLineEqual(term.buffer.lines.get(0), promptLine);
+      assert.deepEqual(term.buffer.lines.get(0), promptLine);
      for (let i = 1; i < term.rows; i++) {
-        assertLineEqual(term.buffer.lines.get(i), term.buffer.getBlankLine(DEFAULT_ATTR_DATA));
+        assert.deepEqual(term.buffer.lines.get(i), term.buffer.getBlankLine(DEFAULT_ATTR_DATA));
      }
    });
  });
@@ -402,7 +389,9 @@ describe('Terminal', () => {

      it('should not scroll down, when a custom keydown handler prevents the event', async () => {
        // Add some output to the terminal
-        await term.writeP('test\r\n'.repeat(term.rows * 3));
+        for (let i = 0; i < term.rows * 3; i++) {
+          await term.writeP('test\r\n');
+        }
        const startYDisp = (term.rows * 2) + 1;
        term.attachCustomKeyEventHandler(() => {
          return false;
@@ -416,42 +405,6 @@ describe('Terminal', () => {
      });
    });

-    describe('keyDown', () => {
-      it('should not scroll down on modifier-only input in win32 input mode', async () => {
-        term.options.vtExtensions = { win32InputMode: true };
-        term.coreService.decPrivateModes.win32InputMode = true;
-        (term as any).textarea = { value: '' };
-
-        await term.writeP('test\r\n'.repeat(term.rows * 3));
-        const startYDisp = term.buffer.ydisp;
-        term.scrollLines(-1);
-        const scrolledYDisp = term.buffer.ydisp;
-        assert.equal(scrolledYDisp, startYDisp - 1);
-
-        const evKeyDown = {
-          type: 'keydown',
-          key: 'Control',
-          keyCode: 17,
-          ctrlKey: true,
-          preventDefault: () => { },
-          stopPropagation: () => { }
-        } as KeyboardEvent;
-
-        const evKeyUp = {
-          type: 'keyup',
-          key: 'Control',
-          keyCode: 17,
-          preventDefault: () => { },
-          stopPropagation: () => { }
-        } as KeyboardEvent;
-
-        term.keyDown(evKeyDown);
-        assert.equal(term.buffer.ydisp, scrolledYDisp);
-        (term as any)._keyUp(evKeyUp);
-        assert.equal(term.buffer.ydisp, scrolledYDisp);
-      });
-    });
-
    describe('scroll() function', () => {
      describe('when scrollback > 0', () => {
        it('should create a new line and scroll', () => {
@@ -778,87 +731,70 @@ describe('Terminal', () => {
      it(`${range}: 2 characters per cell`, async function (): Promise<void> {
        const high = String.fromCharCode(0xD800);
        const cell = new CellData();
-        const values: string[] = [];
        for (let j = i; j <= i + 0xF; j++) {
-          values.push(high + String.fromCharCode(j));
-        }
-        await term.writeP(values.join('\r\n'));
-        for (let idx = 0; idx < values.length; idx++) {
-          const expected = values[idx];
-          const tchar = term.buffer.lines.get(idx)!.loadCell(0, cell);
-          assert.equal(tchar.getChars(), expected);
+          await term.writeP(high + String.fromCharCode(j));
+          const tchar = term.buffer.lines.get(0)!.loadCell(0, cell);
+          assert.equal(tchar.getChars(), high + String.fromCharCode(j));
          assert.equal(tchar.getChars().length, 2);
          assert.equal(tchar.getWidth(), 1);
-          assert.equal(term.buffer.lines.get(idx)!.loadCell(1, cell).getChars(), '');
+          assert.equal(term.buffer.lines.get(0)!.loadCell(1, cell).getChars(), '');
+          term.reset();
        }
      });
      it(`${range}: 2 characters at last cell`, async () => {
        const high = String.fromCharCode(0xD800);
        const cell = new CellData();
-        const values: string[] = [];
+        term.buffer.x = term.cols - 1;
        for (let j = i; j <= i + 0xF; j++) {
-          values.push(high + String.fromCharCode(j));
-        }
-        await term.writeP(values.map((value, idx) => `\x1b[${idx + 1};${term.cols}H${value}`).join(''));
-        for (let idx = 0; idx < values.length; idx++) {
-          const expected = values[idx];
-          assert.equal(term.buffer.lines.get(idx)!.loadCell(term.cols - 1, cell).getChars(), expected);
-          assert.equal(term.buffer.lines.get(idx)!.loadCell(term.cols - 1, cell).getChars().length, 2);
-          assert.equal(term.buffer.lines.get(idx + 1)!.loadCell(0, cell).getChars(), '');
+          await term.writeP(high + String.fromCharCode(j));
+          assert.equal(term.buffer.lines.get(0)!.loadCell(term.buffer.x - 1, cell).getChars(), high + String.fromCharCode(j));
+          assert.equal(term.buffer.lines.get(0)!.loadCell(term.buffer.x - 1, cell).getChars().length, 2);
+          assert.equal(term.buffer.lines.get(1)!.loadCell(0, cell).getChars(), '');
+          term.reset();
        }
      });
      it(`${range}: 2 characters per cell over line end with autowrap`, async function (): Promise<void> {
        const high = String.fromCharCode(0xD800);
        const cell = new CellData();
-        term.resize(term.cols, 40);
-        const values: string[] = [];
        for (let j = i; j <= i + 0xF; j++) {
-          values.push(high + String.fromCharCode(j));
-        }
-        await term.writeP(values.map((value, idx) => `\x1b[${idx * 2 + 1};${term.cols}H` + 'a' + value).join(''));
-        for (let idx = 0; idx < values.length; idx++) {
-          const expected = values[idx];
-          const row = idx * 2;
-          assert.equal(term.buffer.lines.get(row)!.loadCell(term.cols - 1, cell).getChars(), 'a');
-          assert.equal(term.buffer.lines.get(row + 1)!.loadCell(0, cell).getChars(), expected);
-          assert.equal(term.buffer.lines.get(row + 1)!.loadCell(0, cell).getChars().length, 2);
-          assert.equal(term.buffer.lines.get(row + 1)!.loadCell(1, cell).getChars(), '');
+          term.buffer.x = term.cols - 1;
+          await term.writeP('a' + high + String.fromCharCode(j));
+          assert.equal(term.buffer.lines.get(0)!.loadCell(term.cols - 1, cell).getChars(), 'a');
+          assert.equal(term.buffer.lines.get(1)!.loadCell(0, cell).getChars(), high + String.fromCharCode(j));
+          assert.equal(term.buffer.lines.get(1)!.loadCell(0, cell).getChars().length, 2);
+          assert.equal(term.buffer.lines.get(1)!.loadCell(1, cell).getChars(), '');
+          term.reset();
        }
      });
      it(`${range}: 2 characters per cell over line end without autowrap`, async function (): Promise<void> {
        const high = String.fromCharCode(0xD800);
        const cell = new CellData();
-        const values: string[] = [];
        for (let j = i; j <= i + 0xF; j++) {
+          term.buffer.x = term.cols - 1;
+          await term.writeP('\x1b[?7l'); // Disable wraparound mode
          const width = wcwidth((0xD800 - 0xD800) * 0x400 + j - 0xDC00 + 0x10000);
          if (width !== 1) {
            continue;
          }
-          values.push(high + String.fromCharCode(j));
-        }
-        await term.writeP('\x1b[?7l' + values.map((value, idx) => `\x1b[${idx + 1};${term.cols}H` + 'a' + value).join(''));
-        for (let idx = 0; idx < values.length; idx++) {
-          const expected = values[idx];
-          assert.equal(term.buffer.lines.get(idx)!.loadCell(term.cols - 1, cell).getChars(), expected);
-          assert.equal(term.buffer.lines.get(idx)!.loadCell(term.cols - 1, cell).getChars().length, 2);
-          assert.equal(term.buffer.lines.get(idx + 1)!.loadCell(1, cell).getChars(), '');
+          await term.writeP('a' + high + String.fromCharCode(j));
+          // auto wraparound mode should cut off the rest of the line
+          assert.equal(term.buffer.lines.get(0)!.loadCell(term.cols - 1, cell).getChars(), high + String.fromCharCode(j));
+          assert.equal(term.buffer.lines.get(0)!.loadCell(term.cols - 1, cell).getChars().length, 2);
+          assert.equal(term.buffer.lines.get(1)!.loadCell(1, cell).getChars(), '');
+          term.reset();
        }
      });
      it(`${range}: splitted surrogates`, async function (): Promise<void> {
        const high = String.fromCharCode(0xD800);
        const cell = new CellData();
-        const values: string[] = [];
        for (let j = i; j <= i + 0xF; j++) {
-          values.push(high + String.fromCharCode(j));
-        }
-        await term.writeP(values.join('\r\n'));
-        for (let idx = 0; idx < values.length; idx++) {
-          const expected = values[idx];
-          const tchar = term.buffer.lines.get(idx)!.loadCell(0, cell);
-          assert.equal(tchar.getChars(), expected);
+          await term.writeP(high + String.fromCharCode(j));
+          const tchar = term.buffer.lines.get(0)!.loadCell(0, cell);
+          assert.equal(tchar.getChars(), high + String.fromCharCode(j));
          assert.equal(tchar.getChars().length, 2);
          assert.equal(tchar.getWidth(), 1);
-          assert.equal(term.buffer.lines.get(idx)!.loadCell(1, cell).getChars(), '');
+          assert.equal(term.buffer.lines.get(0)!.loadCell(1, cell).getChars(), '');
+          term.reset();
        }
      });
    }
@@ -18,7 +18,7 @@ import { AttributeData } from 'common/buffer/AttributeData';
 import { ISelectionRedrawRequestEvent, ISelectionRequestScrollLinesEvent } from 'browser/selection/Types';
 import { css } from 'common/Color';
 import { createRenderDimensions } from 'browser/renderer/shared/RendererUtils';
-import { Emitter, type IEvent } from 'common/Event';
+import { Emitter, type Event } from 'vs/base/common/event';

 export class TestTerminal extends CoreBrowserTerminal {
  public get curAttrData(): IAttributeData { return (this as any)._inputHandler._curAttrData; }
@@ -30,24 +30,24 @@ export class TestTerminal extends CoreBrowserTerminal {
 }

 export class MockTerminal implements ITerminal {
-  public onBlur!: IEvent<void>;
-  public onFocus!: IEvent<void>;
-  public onA11yChar!: IEvent<string>;
-  public onWriteParsed!: IEvent<void>;
-  public onA11yTab!: IEvent<number>;
-  public onCursorMove!: IEvent<void>;
-  public onLineFeed!: IEvent<void>;
-  public onSelectionChange!: IEvent<void>;
-  public onData!: IEvent<string>;
-  public onBinary!: IEvent<string>;
-  public onTitleChange!: IEvent<string>;
-  public onBell!: IEvent<void>;
-  public onScroll!: IEvent<number>;
-  public onWillOpen!: IEvent<HTMLElement>;
-  public onKey!: IEvent<{ key: string, domEvent: KeyboardEvent }>;
-  public onRender!: IEvent<{ start: number, end: number }>;
-  public onResize!: IEvent<{ cols: number, rows: number }>;
-  public onDimensionsChange!: IEvent<IRenderDimensionsApi>;
+  public onBlur!: Event<void>;
+  public onFocus!: Event<void>;
+  public onA11yChar!: Event<string>;
+  public onWriteParsed!: Event<void>;
+  public onA11yTab!: Event<number>;
+  public onCursorMove!: Event<void>;
+  public onLineFeed!: Event<void>;
+  public onSelectionChange!: Event<void>;
+  public onData!: Event<string>;
+  public onBinary!: Event<string>;
+  public onTitleChange!: Event<string>;
+  public onBell!: Event<void>;
+  public onScroll!: Event<number>;
+  public onWillOpen!: Event<HTMLElement>;
+  public onKey!: Event<{ key: string, domEvent: KeyboardEvent }>;
+  public onRender!: Event<{ start: number, end: number }>;
+  public onResize!: Event<{ cols: number, rows: number }>;
+  public onDimensionsChange!: Event<IRenderDimensionsApi>;
  public dimensions: IRenderDimensionsApi | undefined;
  public markers!: IMarker[];
  public linkifier: ILinkifier2 | undefined;
@@ -107,9 +107,6 @@ export class MockTerminal implements ITerminal {
  public registerOscHandler(ident: number, callback: (data: string) => boolean | Promise<boolean>): IDisposable {
    throw new Error('Method not implemented.');
  }
-  public registerApcHandler(ident: number, callback: (data: string) => boolean | Promise<boolean>): IDisposable {
-    throw new Error('Method not implemented.');
-  }
  public registerLinkProvider(linkProvider: ILinkProvider): IDisposable {
    throw new Error('Method not implemented.');
  }
@@ -198,6 +195,9 @@ export class MockTerminal implements ITerminal {
  public scrollToRow(absoluteRow: number): number {
    throw new Error('Method not implemented.');
  }
+  public cancel(ev: MouseEvent | WheelEvent | KeyboardEvent | InputEvent, force?: boolean): void {
+    throw new Error('Method not implemented.');
+  }
  public log(text: string): void {
    throw new Error('Method not implemented.');
  }
@@ -273,9 +273,9 @@ export class MockBuffer implements IBuffer {
 }

 export class MockRenderer implements IRenderer {
-  public onRequestRedraw!: IEvent<IRequestRedrawEvent>;
-  public onCanvasResize!: IEvent<{ width: number, height: number }>;
-  public onRender!: IEvent<{ start: number, end: number }>;
+  public onRequestRedraw!: Event<IRequestRedrawEvent>;
+  public onCanvasResize!: Event<{ width: number, height: number }>;
+  public onRender!: Event<{ start: number, end: number }>;
  public dispose(): void {
    throw new Error('Method not implemented.');
  }
@@ -378,7 +378,7 @@ export class MockCoreBrowserService implements ICoreBrowserService {
 export class MockCharSizeService implements ICharSizeService {
  public serviceBrand: undefined;
  public get hasValidSize(): boolean { return this.width > 0 && this.height > 0; }
-  public onCharSizeChange: IEvent<void> = new Emitter<void>().event;
+  public onCharSizeChange: Event<void> = new Emitter<void>().event;
  constructor(public width: number, public height: number) {}
  public measure(): void {}
 }
@@ -396,10 +396,10 @@ export class MockMouseService implements IMouseService {

 export class MockRenderService implements IRenderService {
  public serviceBrand: undefined;
-  public onDimensionsChange: IEvent<IRenderDimensions> = new Emitter<IRenderDimensions>().event;
-  public onRenderedViewportChange: IEvent<{ start: number, end: number }> = new Emitter<{ start: number, end: number }>().event;
-  public onRender: IEvent<{ start: number, end: number }> = new Emitter<{ start: number, end: number }>().event;
-  public onRefreshRequest: IEvent<{ start: number, end: number}> = new Emitter<{ start: number, end: number }>().event;
+  public onDimensionsChange: Event<IRenderDimensions> = new Emitter<IRenderDimensions>().event;
+  public onRenderedViewportChange: Event<{ start: number, end: number }> = new Emitter<{ start: number, end: number }>().event;
+  public onRender: Event<{ start: number, end: number }> = new Emitter<{ start: number, end: number }>().event;
+  public onRefreshRequest: Event<{ start: number, end: number}> = new Emitter<{ start: number, end: number }>().event;
  public dimensions: IRenderDimensions = createRenderDimensions();
  public refreshRows(start: number, end: number): void {
    throw new Error('Method not implemented.');
@@ -37,8 +37,8 @@ export class TimeBasedDebouncer implements IRenderDebouncer {
  public refresh(rowStart: number | undefined, rowEnd: number | undefined, rowCount: number): void {
    this._rowCount = rowCount;
    // Get the min/max row start/end for the arg values
-    rowStart = rowStart ?? 0;
-    rowEnd = rowEnd ?? this._rowCount - 1;
+    rowStart = rowStart !== undefined ? rowStart : 0;
+    rowEnd = rowEnd !== undefined ? rowEnd : this._rowCount - 1;
    // Set the properties to the updated values
    this._rowStart = this._rowStart !== undefined ? Math.min(this._rowStart, rowStart) : rowStart;
    this._rowEnd = this._rowEnd !== undefined ? Math.max(this._rowEnd, rowEnd) : rowEnd;
@@ -7,7 +7,7 @@ import { CharData, IColor, ICoreTerminal, ITerminalOptions } from 'common/Types'
 import { IBuffer } from 'common/buffer/Types';
 import { IDisposable, IRenderDimensions as IRenderDimensionsApi, Terminal as ITerminalApi } from '@xterm/xterm';
 import { channels, css } from 'common/Color';
-import type { IEvent } from 'common/Event';
+import type { Event } from 'vs/base/common/event';

 /**
 * A portion of the public API that are implemented identially internally and simply passed through.
@@ -23,12 +23,14 @@ export interface ITerminal extends InternalPassthroughApis, ICoreTerminal {

  readonly dimensions: IRenderDimensionsApi | undefined;

-  onBlur: IEvent<void>;
-  onFocus: IEvent<void>;
-  onDimensionsChange: IEvent<IRenderDimensionsApi>;
-  onA11yChar: IEvent<string>;
-  onA11yTab: IEvent<number>;
-  onWillOpen: IEvent<HTMLElement>;
+  onBlur: Event<void>;
+  onFocus: Event<void>;
+  onDimensionsChange: Event<IRenderDimensionsApi>;
+  onA11yChar: Event<string>;
+  onA11yTab: Event<number>;
+  onWillOpen: Event<HTMLElement>;
+
+  cancel(ev: MouseEvent | WheelEvent | KeyboardEvent | InputEvent, force?: boolean): boolean | void;
 }

 export type CustomKeyEventHandler = (event: KeyboardEvent) => boolean;
@@ -99,7 +101,7 @@ export interface IPartialColorSet {

 export interface IViewport extends IDisposable {
  scrollBarWidth: number;
-  readonly onRequestScrollLines: IEvent<{ amount: number, suppressScrollEvent: boolean }>;
+  readonly onRequestScrollLines: Event<{ amount: number, suppressScrollEvent: boolean }>;
  syncScrollArea(immediate?: boolean, force?: boolean): void;
  getLinesScrolled(ev: WheelEvent): number;
  getBufferElements(startLine: number, endLine?: number): { bufferElements: HTMLElement[], cursorElement?: HTMLElement };
@@ -129,8 +131,8 @@ export interface ILinkWithState {
 }

 export interface ILinkifier2 extends IDisposable {
-  onShowLinkUnderline: IEvent<ILinkifierEvent>;
-  onHideLinkUnderline: IEvent<ILinkifierEvent>;
+  onShowLinkUnderline: Event<ILinkifierEvent>;
+  onHideLinkUnderline: Event<ILinkifierEvent>;
  readonly currentLink: ILinkWithState | undefined;
 }

@@ -5,15 +5,15 @@

 import { ICoreBrowserService, IRenderService, IThemeService } from 'browser/services/Services';
 import { ViewportConstants } from 'browser/shared/Constants';
-import { Disposable, toDisposable } from 'common/Lifecycle';
+import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
 import { IBufferService, ICoreMouseService, IOptionsService } from 'common/services/Services';
 import { CoreMouseEventType } from 'common/Types';
-import { addDisposableListener, scheduleAtNextAnimationFrame } from 'browser/Dom';
-import { SmoothScrollableElement } from 'browser/scrollable/scrollableElement';
-import type { IScrollableElementChangeOptions } from 'browser/scrollable/scrollableElementOptions';
-import { Emitter, EventUtils } from 'common/Event';
-import { Scrollable, ScrollbarVisibility, type IScrollEvent } from 'browser/scrollable/scrollable';
-import { Gesture, EventType as GestureEventType, type IGestureEvent } from 'browser/scrollable/touch';
+import { addDisposableListener, scheduleAtNextAnimationFrame } from 'vs/base/browser/dom';
+import { SmoothScrollableElement } from 'vs/base/browser/ui/scrollbar/scrollableElement';
+import type { ScrollableElementChangeOptions } from 'vs/base/browser/ui/scrollbar/scrollableElementOptions';
+import { Emitter, Event } from 'vs/base/common/event';
+import { Scrollable, ScrollbarVisibility, type ScrollEvent } from 'vs/base/common/scrollable';
+import { Gesture, EventType as GestureEventType, type GestureEvent } from 'vs/base/browser/touch';

 export class Viewport extends Disposable {

@@ -52,17 +52,16 @@ export class Viewport extends Disposable {
    }));

    this._scrollableElement = this._register(new SmoothScrollableElement(screenElement, {
-      vertical: ScrollbarVisibility.AUTO,
-      horizontal: ScrollbarVisibility.HIDDEN,
+      vertical: ScrollbarVisibility.Auto,
+      horizontal: ScrollbarVisibility.Hidden,
      useShadows: false,
      mouseWheelSmoothScroll: true,
-      verticalHasArrows: this._optionsService.rawOptions.scrollbar?.showArrows ?? false,
      ...this._getChangeOptions()
    }, scrollable));
    this._register(this._optionsService.onMultipleOptionChange([
      'scrollSensitivity',
      'fastScrollSensitivity',
-      'scrollbar'
+      'overviewRuler'
    ], () => this._scrollableElement.updateOptions(this._getChangeOptions())));
    // Don't handle mouse wheel if wheel events are supported by the current mouse prototcol
    this._register(coreMouseService.onProtocolChange(type => {
@@ -72,7 +71,7 @@ export class Viewport extends Disposable {
    }));

    this._scrollableElement.setScrollDimensions({ height: 0, scrollHeight: 0 });
-    this._register(EventUtils.runAndSubscribe(themeService.onChangeColors, () => {
+    this._register(Event.runAndSubscribe(themeService.onChangeColors, () => {
      element.style.backgroundColor = themeService.colors.background.css;
      this._scrollableElement.getDomNode().style.backgroundColor = themeService.colors.background.css;
    }));
@@ -82,15 +81,15 @@ export class Viewport extends Disposable {
    this._styleElement = coreBrowserService.mainDocument.createElement('style');
    screenElement.appendChild(this._styleElement);
    this._register(toDisposable(() => this._styleElement.remove()));
-    this._register(EventUtils.runAndSubscribe(themeService.onChangeColors, () => {
+    this._register(Event.runAndSubscribe(themeService.onChangeColors, () => {
      this._styleElement.textContent = [
-        `.xterm .xterm-scrollable-element > .xterm-scrollbar > .xterm-slider {`,
+        `.xterm .xterm-scrollable-element > .scrollbar > .slider {`,
        `  background: ${themeService.colors.scrollbarSliderBackground.css};`,
        `}`,
-        `.xterm .xterm-scrollable-element > .xterm-scrollbar > .xterm-slider:hover {`,
+        `.xterm .xterm-scrollable-element > .scrollbar > .slider:hover {`,
        `  background: ${themeService.colors.scrollbarSliderHoverBackground.css};`,
        `}`,
-        `.xterm .xterm-scrollable-element > .xterm-scrollbar > .xterm-slider.xterm-active {`,
+        `.xterm .xterm-scrollable-element > .scrollbar > .slider.active {`,
        `  background: ${themeService.colors.scrollbarSliderActiveBackground.css};`,
        `}`
      ].join('\n');
@@ -109,7 +108,7 @@ export class Viewport extends Disposable {

    // Touch/gesture scrolling support
    this._register(Gesture.addTarget(screenElement));
-    this._register(addDisposableListener(screenElement, GestureEventType.CHANGE, (e: IGestureEvent) => this._handleGestureChange(e)));
+    this._register(addDisposableListener(screenElement, GestureEventType.Change, (e: GestureEvent) => this._handleGestureChange(e)));
  }

  public scrollLines(disp: number): void {
@@ -130,18 +129,11 @@ export class Viewport extends Disposable {
    });
  }

-  private _getChangeOptions(): IScrollableElementChangeOptions {
-    const showScrollbar = this._optionsService.rawOptions.scrollbar?.showScrollbar ?? true;
-    const showArrows = this._optionsService.rawOptions.scrollbar?.showArrows ?? false;
-    const verticalScrollbarSize = showScrollbar
-      ? (this._optionsService.rawOptions.scrollbar?.width ?? ViewportConstants.DEFAULT_SCROLL_BAR_WIDTH)
-      : 0;
+  private _getChangeOptions(): ScrollableElementChangeOptions {
    return {
      mouseWheelScrollSensitivity: this._optionsService.rawOptions.scrollSensitivity,
      fastScrollSensitivity: this._optionsService.rawOptions.fastScrollSensitivity,
-      vertical: showScrollbar ? ScrollbarVisibility.AUTO : ScrollbarVisibility.HIDDEN,
-      verticalScrollbarSize,
-      verticalHasArrows: showArrows
+      verticalScrollbarSize: this._optionsService.rawOptions.overviewRuler?.width || ViewportConstants.DEFAULT_SCROLL_BAR_WIDTH
    };
  }

@@ -187,7 +179,7 @@ export class Viewport extends Disposable {
    this._isSyncing = false;
  }

-  private _handleScroll(e: IScrollEvent): void {
+  private _handleScroll(e: ScrollEvent): void {
    if (!this._renderService) {
      return;
    }
@@ -204,7 +196,7 @@ export class Viewport extends Disposable {
    this._isHandlingScroll = false;
  }

-  private _handleGestureChange(e: IGestureEvent): void {
+  private _handleGestureChange(e: GestureEvent): void {
    e.preventDefault();
    e.stopPropagation();
    const pos = this._scrollableElement.getScrollPosition();
@@ -4,7 +4,7 @@
 *--------------------------------------------------------------------------------------------*/

 import { ICoreBrowserService, IRenderService } from 'browser/services/Services';
-import { Disposable, toDisposable } from 'common/Lifecycle';
+import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
 import { IBufferService, IDecorationService, IInternalDecoration } from 'common/services/Services';

 export class BufferDecorationRenderer extends Disposable {
@@ -5,7 +5,7 @@

 import { ColorZoneStore, IColorZone, IColorZoneStore } from 'browser/decorations/ColorZoneStore';
 import { ICoreBrowserService, IRenderService, IThemeService } from 'browser/services/Services';
-import { Disposable, toDisposable } from 'common/Lifecycle';
+import { Disposable, toDisposable } from 'vs/base/common/lifecycle';
 import { IBufferService, IDecorationService, IOptionsService } from 'common/services/Services';

 const enum Constants {
@@ -38,12 +38,7 @@ export class OverviewRulerRenderer extends Disposable {
  private readonly _ctx: CanvasRenderingContext2D;
  private readonly _colorZoneStore: IColorZoneStore = new ColorZoneStore();
  private get _width(): number {
-    const scrollbar = this._optionsService.rawOptions.scrollbar;
-    const showScrollbar = scrollbar?.showScrollbar ?? true;
-    if (!showScrollbar) {
-      return 0;
-    }
-    return scrollbar?.width ?? 0;
+    return this._optionsService.options.overviewRuler?.width || 0;
  }
  private _animationFrame: number | undefined;

@@ -100,7 +95,7 @@ export class OverviewRulerRenderer extends Disposable {
    }));

    this._register(this._coreBrowserService.onDprChange(() => this._queueRefresh(true)));
-    this._register(this._optionsService.onSpecificOptionChange('scrollbar', () => this._queueRefresh(true)));
+    this._register(this._optionsService.onSpecificOptionChange('overviewRuler', () => this._queueRefresh(true)));
    this._register(this._themeService.onChangeColors(() => this._queueRefresh()));
    this._queueRefresh(true);
  }
@@ -181,10 +176,10 @@ export class OverviewRulerRenderer extends Disposable {
  private _renderRulerOutline(): void {
    this._ctx.fillStyle = this._themeService.colors.overviewRulerBorder.css;
    this._ctx.fillRect(0, 0, Constants.OVERVIEW_RULER_BORDER_WIDTH, this._canvas.height);
-    if (this._optionsService.rawOptions.scrollbar?.overviewRuler?.showTopBorder) {
+    if (this._optionsService.rawOptions.overviewRuler.showTopBorder) {
      this._ctx.fillRect(Constants.OVERVIEW_RULER_BORDER_WIDTH, 0, this._canvas.width - Constants.OVERVIEW_RULER_BORDER_WIDTH, Constants.OVERVIEW_RULER_BORDER_WIDTH);
    }
-    if (this._optionsService.rawOptions.scrollbar?.overviewRuler?.showBottomBorder) {
+    if (this._optionsService.rawOptions.overviewRuler.showBottomBorder) {
      this._ctx.fillRect(Constants.OVERVIEW_RULER_BORDER_WIDTH, this._canvas.height - Constants.OVERVIEW_RULER_BORDER_WIDTH, this._canvas.width - Constants.OVERVIEW_RULER_BORDER_WIDTH, this._canvas.height);
    }
  }
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
copilot-swe-agent[bot]andTyriar	369ca9b525	Add error handling for dynamic imports Co-authored-by: Tyriar <2193314+Tyriar@users.noreply.github.com>	2026-01-16 01:58:45 +00:00
copilot-swe-agent[bot]andTyriar	a5422d1b11	Add dynamic imports for AccessibilityManager and OverviewRulerRenderer Co-authored-by: Tyriar <2193314+Tyriar@users.noreply.github.com>	2026-01-16 01:56:13 +00:00
copilot-swe-agent[bot]andTyriar	c2890d8a4d	Add error handling for dynamic import in loadCustomGlyphDefinitions Co-authored-by: Tyriar <2193314+Tyriar@users.noreply.github.com>	2026-01-16 01:14:01 +00:00
copilot-swe-agent[bot]andTyriar	7a7abddc45	Use dynamic imports for custom glyphs in WebGL addon Co-authored-by: Tyriar <2193314+Tyriar@users.noreply.github.com>	2026-01-16 01:12:01 +00:00
copilot-swe-agent[bot]andTyriar	8c71bfd65f	Revert @xterm/xterm alias to use package.json resolution Co-authored-by: Tyriar <2193314+Tyriar@users.noreply.github.com>	2026-01-16 00:41:57 +00:00
copilot-swe-agent[bot]andTyriar	3c2b911439	Set up code splitting for ESM build Co-authored-by: Tyriar <2193314+Tyriar@users.noreply.github.com>	2026-01-16 00:40:40 +00:00
copilot-swe-agent[bot]	5ee8760418	Initial plan	2026-01-16 00:31:02 +00:00