abab (2.0.6)

Published 2026-02-24 13:52:28 +00:00 by atheaadmin

Installation

registry=
npm install abab@2.0.6
"abab": "2.0.6"

About this package

abab npm version Build Status

A JavaScript module that implements window.atob and window.btoa according the forgiving-base64 algorithm in the Infra Standard. The original code was forked from w3c/web-platform-tests.

Compatibility: Node.js version 3+ and all major browsers.

Install with npm:

npm install abab

API

btoa (base64 encode)

const { btoa } = require('abab');
btoa('Hello, world!'); // 'SGVsbG8sIHdvcmxkIQ=='

atob (base64 decode)

const { atob } = require('abab');
atob('SGVsbG8sIHdvcmxkIQ=='); // 'Hello, world!'

Valid characters

Per the spec, btoa will accept strings "containing only characters in the range U+0000 to U+00FF." If passed a string with characters above U+00FF, btoa will return null. If atob is passed a string that is not base64-valid, it will also return null. In both cases when null is returned, the spec calls for throwing a DOMException of type InvalidCharacterError.

Browsers

If you want to include just one of the methods to save bytes in your client-side code, you can require the desired module directly.

const atob = require('abab/lib/atob');
const btoa = require('abab/lib/btoa');

Development

If you're submitting a PR or deploying to npm, please use the checklists in CONTRIBUTING.md.

Remembering what atob and btoa stand for

Base64 comes from IETF RFC 4648 (2006).

  • btoa, the encoder function, stands for binary to ASCII, meaning it converts any binary input into a subset of ASCII (Base64).
  • atob, the decoder function, converts ASCII (or Base64) to its original binary format.

Dependencies

Development Dependencies

ID Version
eslint ^4.19.1
karma ^2.0.0
karma-cli ^1.0.1
karma-firefox-launcher ^1.1.0
karma-mocha ^1.3.0
karma-webpack ^3.0.0
mocha ^5.1.0
webpack ^4.5.0

Keywords

atob btoa browser
Details
npm
2026-02-24 13:52:28 +00:00
1
Jeff Carpenter
BSD-3-Clause
latest
4.5 KiB
Assets (1)
abab-2.0.6.tgz 4.5 KiB
Versions (1) View all
2.0.6 2026-02-24