Office Whisperer

import { fromString } from "@smithy/util-buffer-from"; const BASE64_REGEX = /^[A-Za-z0-9+/]*={0,2}$/; export const fromBase64 = (input) => { if ((input.length * 3) % 4 !== 0) { throw new TypeError(`Incorrect padding on base64 string.`); } if (!BASE64_REGEX.exec(input)) { throw new TypeError(`Invalid base64 string.`); } const buffer = fromString(input, "base64"); return new Uint8Array(buffer.buffer, buffer.byteOffset, buffer.byteLength); };