Remove support for IE11

Fixes #1889

README.md

@@ -85,13 +85,7 @@ The xterm.js team maintains the following addons but they can be built by anyone
 
 ## Browser Support
 
-Since xterm.js is typically implemented as a developer tool, only modern browsers are supported officially. Here is a list of the versions we aim to support:
-
-- Chrome latest
-- Edge latest
-- Firefox latest
-- Safari latest
-- IE11
+Since xterm.js is typically implemented as a developer tool, only modern browsers are supported officially. Specifically the latest versions of *Chrome*, *Edge*, *Firefox* and *Safari*.
 
 Xterm.js works seamlessly in [Electron](https://electronjs.org/) apps and may even work on earlier versions of the browsers, these are the versions we strive to keep working.
 

src/Clipboard.ts

@@ -38,12 +38,7 @@ export function bracketTextForPaste(text: string, bracketedPasteMode: boolean):
  * @param ev The original copy event to be handled
  */
 export function copyHandler(ev: ClipboardEvent, term: ITerminal, selectionManager: ISelectionManager): void {
-  if (term.browser.isMSIE) {
-    window.clipboardData.setData('Text', selectionManager.selectionText);
-  } else {
-    ev.clipboardData.setData('text/plain', selectionManager.selectionText);
-  }
-
+  ev.clipboardData.setData('text/plain', selectionManager.selectionText);
   // Prevent or the original text will be copied.
   ev.preventDefault();
 }
@@ -66,16 +61,9 @@ export function pasteHandler(ev: ClipboardEvent, term: ITerminal): void {
     term.cancel(ev);
   };
 
-  if (term.browser.isMSIE) {
-    if (window.clipboardData) {
-      text = window.clipboardData.getData('Text');
-      dispatchPaste(text);
-    }
-  } else {
-    if (ev.clipboardData) {
-      text = ev.clipboardData.getData('text/plain');
-      dispatchPaste(text);
-    }
+  if (ev.clipboardData) {
+    text = ev.clipboardData.getData('text/plain');
+    dispatchPaste(text);
   }
 }
 

src/Terminal.ts

@@ -890,10 +890,6 @@ export class Terminal extends Disposable implements ITerminal, IDisposable, IInp
           : ev.which !== null && ev.which !== undefined
             ? ev.which - 1
           : null;
-
-          if (Browser.isMSIE) {
-            button = button === 1 ? 0 : button === 4 ? 1 : button;
-          }
           break;
         case 'mouseup':
           button = 3;

src/Types.ts

@@ -365,7 +365,6 @@ export interface IBrowser {
   userAgent: string;
   platform: string;
   isFirefox: boolean;
-  isMSIE: boolean;
   isMac: boolean;
   isIpad: boolean;
   isIphone: boolean;

src/common/Platform.ts

@@ -19,7 +19,6 @@ const platform = (isNode) ? 'node' : navigator.platform;
 
 export const isFirefox = !!~userAgent.indexOf('Firefox');
 export const isSafari = /^((?!chrome|android).)*safari/i.test(userAgent);
-export const isMSIE = !!~userAgent.indexOf('MSIE') || !!~userAgent.indexOf('Trident');
 
 // Find the users platform. We use this to interpret the meta key
 // and ISO third level shifts.