27 lines
792 B
JavaScript
27 lines
792 B
JavaScript
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// from blob-util
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function blobToBinaryString(blob) {
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return new Promise(function (resolve, reject) {
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var reader = new FileReader();
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var hasBinaryString = typeof reader.readAsBinaryString === 'function';
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reader.onloadend = function (e) {
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var result = e.target.result || '';
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if (hasBinaryString) {
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return resolve(result);
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}
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resolve(arrayBufferToBinaryString(result));
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};
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reader.onerror = reject;
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if (hasBinaryString) {
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reader.readAsBinaryString(blob);
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} else {
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reader.readAsArrayBuffer(blob);
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}
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});
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}
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export function blobToBase64(blob) {
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return blobToBinaryString(blob).then(function (binary) {
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// web-safe variant
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return btoa(binary).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
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});
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}
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