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32 lines
904 B
32 lines
904 B
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow strict
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*/
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'use strict';
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const base64 = require('base64-js');
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function binaryToBase64(data: ArrayBuffer | $ArrayBufferView): string {
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if (data instanceof ArrayBuffer) {
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// $FlowFixMe[reassign-const]
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data = new Uint8Array(data);
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}
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if (data instanceof Uint8Array) {
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return base64.fromByteArray(data);
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}
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if (!ArrayBuffer.isView(data)) {
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throw new Error('data must be ArrayBuffer or typed array');
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}
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// Already checked that `data` is `DataView` in `ArrayBuffer.isView(data)`
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const {buffer, byteOffset, byteLength} = ((data: $FlowFixMe): DataView);
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return base64.fromByteArray(new Uint8Array(buffer, byteOffset, byteLength));
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}
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module.exports = binaryToBase64;
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