Yet another Base64 transcoder in pure-JS. 

dankogai

js-base64

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 *  Licensed under the BSD 3-Clause License.

 *    http://opensource.org/licenses/BSD-3-Clause

 *    http://en.wikipedia.org/wiki/Base64

 * @author Dan Kogai (https://github.com/dankogai)

declare const btoaPolyfill: (bin: string) => string;

 * does what `window.btoa` of web browsers do.

 * @returns {string} Base64-encoded string

declare const _btoa: (bin: string) => string;

 * converts a Uint8Array to a Base64 string.

 * @param {boolean} [urlsafe] URL-and-filename-safe a la RFC4648 §5

declare const fromUint8Array: (u8a: Uint8Array, urlsafe?: boolean) => string;

 * @deprecated should have been internal use only.

declare const utob: (u: string) => string;

 * converts a UTF-8-encoded string to a Base64 string.

 * @param {boolean} [urlsafe] if `true` make the result URL-safe

declare const encode: (src: string, urlsafe?: boolean) => string;

 * converts a UTF-8-encoded string to URL-safe Base64 RFC4648 §5.

declare const encodeURI: (src: string) => string;

declare const btou: (b: string) => string;

declare const atobPolyfill: (asc: string) => string;

 * does what `window.atob` of web browsers do.

 * @param {String} asc Base64-encoded string

declare const _atob: (asc: string) => string;

 * converts a Base64 string to a Uint8Array.

declare const toUint8Array: (a: string) => Uint8Array;

 * converts a Base64 string to a UTF-8 string.

 * @param {String} src Base64 string.  Both normal and URL-safe are supported

declare const decode: (src: string) => string;

 * check if a value is a valid Base64 string

declare const isValid: (src: any) => boolean;

 * extend String.prototype with relevant methods

 * extend Uint8Array.prototype with relevant methods

declare const extendUint8Array: () => void;

 * extend Builtin prototypes with relevant methods

declare const extendBuiltins: () => void;

    atobPolyfill: (asc: string) => string;

    btoaPolyfill: (bin: string) => string;

    toBase64: (src: string, urlsafe?: boolean) => string;

    encode: (src: string, urlsafe?: boolean) => string;

    fromUint8Array: (u8a: Uint8Array, urlsafe?: boolean) => string;

    toUint8Array: (a: string) => Uint8Array;

// THIS FILE IS AUTOMATICALLY GENERATED! DO NOT EDIT BY HAND!

    typeof exports === 'object' && typeof module !== 'undefined'

        : typeof define === 'function' && define.amd

            // cf. https://github.com/dankogai/js-base64/issues/119

                // existing version for noConflict()

                var _Base64 = global.Base64;

                gBase64.noConflict = function () {

                    global.Base64 = _Base64;

                if (global.Meteor) { // Meteor.js

    : typeof window !== 'undefined' ? window

        : typeof global !== 'undefined' ? global

     *  Licensed under the BSD 3-Clause License.

     *    http://opensource.org/licenses/BSD-3-Clause

     *    http://en.wikipedia.org/wiki/Base64

     * @author Dan Kogai (https://github.com/dankogai)

     * @deprecated use lowercase `version`.

    var _hasatob = typeof atob === 'function';

    var _hasbtoa = typeof btoa === 'function';

    var _hasBuffer = typeof Buffer === 'function';

    var _TD = typeof TextDecoder === 'function' ? new TextDecoder() : undefined;

    var _TE = typeof TextEncoder === 'function' ? new TextEncoder() : undefined;

    var b64ch = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';

    var b64chs = Array.prototype.slice.call(b64ch);

        a.forEach(function (c, i) { return tab[c] = i; });

    var b64re = /^(?:[A-Za-z\d+\/]{4})*?(?:[A-Za-z\d+\/]{2}(?:==)?|[A-Za-z\d+\/]{3}=?)?$/;

    var _fromCC = String.fromCharCode.bind(String);

    var _U8Afrom = typeof Uint8Array.from === 'function'

        ? Uint8Array.from.bind(Uint8Array)

            if (fn === void 0) { fn = function (x) { return x; }; }

            return new Uint8Array(Array.prototype.slice.call(it, 0).map(fn));

    var _mkUriSafe = function (src) { return src

        .replace(/=/g, '').replace(/[+\/]/g, function (m0) { return m0 == '+' ? '-' : '_'; }); };

    var _tidyB64 = function (s) { return s.replace(/[^A-Za-z0-9\+\/]/g, ''); };

        for (var i = 0; i < bin.length;) {

            if ((c0 = bin.charCodeAt(i++)) > 255 ||

                (c1 = bin.charCodeAt(i++)) > 255 ||

                (c2 = bin.charCodeAt(i++)) > 255)

                throw new TypeError('invalid character found');

            u32 = (c0 << 16) | (c1 << 8) | c2;

            asc += b64chs[u32 >> 18 & 63]

        return pad ? asc.slice(0, pad - 3) + "===".substring(pad) : asc;

     * does what `window.btoa` of web browsers do.

     * @returns {string} Base64-encoded string

    var _btoa = _hasbtoa ? function (bin) { return btoa(bin); }

        : _hasBuffer ? function (bin) { return Buffer.from(bin, 'binary').toString('base64'); }

        ? function (u8a) { return Buffer.from(u8a).toString('base64'); }

            // cf. https://stackoverflow.com/questions/12710001/how-to-convert-uint8-array-to-base64-encoded-string/12713326#12713326

            for (var i = 0, l = u8a.length; i < l; i += maxargs) {

                strs.push(_fromCC.apply(null, u8a.subarray(i, i + maxargs)));

     * converts a Uint8Array to a Base64 string.

     * @param {boolean} [urlsafe] URL-and-filename-safe a la RFC4648 §5

    var fromUint8Array = function (u8a, urlsafe) {

        if (urlsafe === void 0) { urlsafe = false; }

        return urlsafe ? _mkUriSafe(_fromUint8Array(u8a)) : _fromUint8Array(u8a);

		@@ -12,7 +12,7 @@ /**
		*/
		declare const version = "3.7.3";
		declare const version = "3.7.4";
		/**
		* @deprecated use lowercase `version`.
		*/
		declare const VERSION = "3.7.3";
		declare const VERSION = "3.7.4";
		/**
		@@ -19,0 +19,0 @@ * polyfill version of `btoa`

		@@ -40,3 +40,3 @@ //
		*/
		var version = '3.7.3';
		var version = '3.7.4';
		/**
		@@ -43,0 +43,0 @@ * @deprecated use lowercase `version`.

		{
		"name": "js-base64",
		"version": "3.7.3",
		"version": "3.7.4",
		"description": "Yet another Base64 transcoder in pure-JS",
		@@ -8,2 +8,3 @@ "main": "base64.js",
		"types": "base64.d.ts",
		"sideEffects": false,
		"files": [
		@@ -10,0 +11,0 @@ "base64.js",

		@@ -28,3 +28,3 @@ [![CI via GitHub Actions](https://github.com/dankogai/js-base64/actions/workflows/node.js.yml/badge.svg)](https://github.com/dankogai/js-base64/actions/workflows/node.js.yml)
		```html
		<script src="https://cdn.jsdelivr.net/npm/js-base64@3.7.3/base64.min.js"></script>
		<script src="https://cdn.jsdelivr.net/npm/js-base64@3.7.4/base64.min.js"></script>
		```
		@@ -52,3 +52,3 @@
		// note jsdelivr.net does not automatically minify .mjs
		import { Base64 } from 'https://cdn.jsdelivr.net/npm/js-base64@3.7.3/base64.mjs';
		import { Base64 } from 'https://cdn.jsdelivr.net/npm/js-base64@3.7.4/base64.mjs';
		</script>
		@@ -60,3 +60,3 @@ ```
		// or if you prefer no Base64 namespace
		import { encode, decode } from 'https://cdn.jsdelivr.net/npm/js-base64@3.7.3/base64.mjs';
		import { encode, decode } from 'https://cdn.jsdelivr.net/npm/js-base64@3.7.4/base64.mjs';
		</script>
		@@ -63,0 +63,0 @@ ```

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