Enable strict null checks in webgl addon

Part of #2286
2019-07-04 08:58:42 -07:00
parent 0898de147f
commit 40bc62c383
10 changed files with 91 additions and 74 deletions
@@ -15,6 +15,7 @@ import { IRenderDimensions } from 'browser/renderer/Types';
 import { CellData } from 'common/buffer/CellData';
 import { AttributeData } from 'common/buffer/AttributeData';
 import { WebglCharAtlas } from 'atlas/WebglCharAtlas';
+import { throwIfFalsy } from '../WebglUtils';

 export abstract class BaseRenderLayer implements IRenderLayer {
  private _canvas: HTMLCanvasElement;
@@ -63,7 +64,7 @@ export abstract class BaseRenderLayer implements IRenderLayer {
  }

  private _initCanvas(): void {
-    this._ctx = this._canvas.getContext('2d', {alpha: this._alpha});
+    this._ctx = throwIfFalsy(this._canvas.getContext('2d', {alpha: this._alpha}));
    // Draw the background if this is an opaque layer
    if (!this._alpha) {
      this._clearAll();