base64

Base64 encoding/decoding in pure JS on both modern Browsers and Node.js based on base64-js.
Also supports URL-safe base64

Features

• Supports typeof string, number and bigint
• Supports ArrayBuffer or Uint8Array
• Encoding/Decoding via TextEncoder/TextDecoder under browser and Buffer under Node.js
• Building various modulesESM, UMD and CJS

Browser requirement

• Ability of TextEncoder and TextDecoder
• Polyfill text-encoding for Edge

Node.js requirement

• v10.4.0+ for bigint base64 encoding
• ICU installation for base64 decoding with char encodings other then utf-8 and utf-16le

Installing

npm install @waiting/base64

Usage of Node.js

See the Docs for details

Encoding

import { b64encode, b64fromBuffer, b64urlEncode } from '@waiting/base64'

b64encode('A') === 'QQ=='
b64encode('schöne') === 'c2Now7ZuZQ=='
b64encode(1n) === b64encode(1) // bigint -> 'MQ==' 
b64encode('𠮷') === b64encode('\uD842\uDFB7') === b64encode('\u{20BB7}') // '8KCutw=='

const u8arr = Uint8Array.from([0xe4, 0xb8, 0xad, 0xe6, 0x96, 0x87])
b64fromBuffer(u8arr) === b64encode('中文')  // '5Lit5paH'

// URL-safe
b64urlEncode('A') === 'QQ'
b64urlEncode('中文测试') === '5Lit5paH5rWL6K-V'

Decoding

import { b64decode, b64urlDecode } from '@waiting/base64'

b64decode('MQ==') === '1'
b64urlDecode('MQ') === '1'

Transfer

import { b64toURLSafe, b64fromURLSafe } from '@waiting/base64'

// base64 -> URL-safe base64
b64toURLSafe('QQ==') === 'QQ'
b64toURLSafe('5Lit5paH5rWL6K+V') === '5Lit5paH5rWL6K-V'

// URL-safe base64 -> base64
b64fromURLSafe('QQ') === 'QQ=='
b64fromURLSafe('0J_RgNC40LLQtdGCLCDQvNC40YAh') === '0J/RgNC40LLQtdGCLCDQvNC40YAh'

Usage of browser

See the Docs for details

ESM

<script type="module">
  import { b64encode, b64urlEncode } from './base64.esm.min.js' 
  
  console.log( b64encode('A') ) // 'QQ=='
  console.log( b64urlEncode('A') )  // 'QQ'
  console.log( b64encode('\uD842\uDFB7') ) // '8KCutw=='
</script>

UMD

<!-- polyfill for Edge
  Note: text-encoder-lite parse 4-bytes UTF-8 char incorrectly,
  so use text-encoding instead.
  see: https://github.com/solderjs/TextEncoderLite/issues/16
-->
<!--
<script src="https://raw.githubusercontent.com/inexorabletash/text-encoding/master/lib/encoding-indexes.js"></script>
<script src="https://raw.githubusercontent.com/inexorabletash/text-encoding/master/lib/encoding.js"></script>
-->
<script src="./base64.umd.min.js"></script>
<script>
  // global variable base64
  console.log( base64.b64encode('A') )
  console.log( base64.b64urlEncode('A') )
  console.log( base64.b64encode('\uD842\uDFB7') )
</script>

Testing

npm run test

# for browsers FireFox and Chrome
npm run test:browser

# for browsers all available on this client
cd .config && npm i
npm run browser:detect

Demo

• Browser
• Node.js

License

MIT

Languages

• English
• 中文