30 lines
846 B
TypeScript
30 lines
846 B
TypeScript
import 'core-js/features/object/assign';
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import 'core-js/features/object/values';
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import 'core-js/features/symbol';
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import 'core-js/features/promise/finally';
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import { decode as decodeBase64 } from '../utils/base64';
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if (!HTMLCanvasElement.prototype.toBlob) {
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const BASE64_MARKER = ';base64,';
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Object.defineProperty(HTMLCanvasElement.prototype, 'toBlob', {
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value: function (
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this: HTMLCanvasElement,
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callback: BlobCallback,
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type = 'image/png',
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quality: unknown
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) {
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const dataURL: string = this.toDataURL(type, quality);
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let data;
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if (dataURL.indexOf(BASE64_MARKER) >= 0) {
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const [, base64] = dataURL.split(BASE64_MARKER);
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data = decodeBase64(base64);
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} else {
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[, data] = dataURL.split(',');
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}
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callback(new Blob([data], { type }));
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},
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});
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}
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