angular-docs-cn/packages/zone.js/lib/browser/canvas.ts

17 lines
660 B
TypeScript

/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
Zone.__load_patch('canvas', (global: any, Zone: ZoneType, api: _ZonePrivate) => {
const HTMLCanvasElement = global['HTMLCanvasElement'];
if (typeof HTMLCanvasElement !== 'undefined' && HTMLCanvasElement.prototype &&
HTMLCanvasElement.prototype.toBlob) {
api.patchMacroTask(HTMLCanvasElement.prototype, 'toBlob', (self: any, args: any[]) => {
return {name: 'HTMLCanvasElement.toBlob', target: self, cbIdx: 0, args: args};
});
}
});