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The abab npm package is a utility that provides Base64 encoding and decoding as well as window.atob and window.btoa polyfills for Node.js. It is designed to mimic the behavior of these methods in the web browser environment.
Base64 Encoding
This feature allows you to encode a string to Base64. The provided code sample demonstrates how to encode the string 'Hello, World!' using the btoa function.
"use strict";
const abab = require('abab');
let encodedData = abab.btoa('Hello, World!');
console.log(encodedData); // Outputs: SGVsbG8sIFdvcmxkIQ==
Base64 Decoding
This feature allows you to decode a Base64 encoded string. The provided code sample demonstrates how to decode the string 'SGVsbG8sIFdvcmxkIQ==' using the atob function.
"use strict";
const abab = require('abab');
let decodedData = abab.atob('SGVsbG8sIFdvcmxkIQ==');
console.log(decodedData); // Outputs: Hello, World!
The base-64 package offers a robust and performant way to encode and decode Base64 strings in Node.js. It is similar to abab but focuses solely on Base64 encoding and decoding without trying to polyfill browser-specific APIs.
js-base64 is another popular package for encoding and decoding Base64 strings. It works in both Node.js and browser environments and provides additional features such as Unicode support and URL-safe encoding/decoding. It is more feature-rich compared to abab.
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
btoa
(base64 encode)const { btoa } = require('abab');
btoa('Hello, world!'); // 'SGVsbG8sIHdvcmxkIQ=='
atob
(base64 decode)const { atob } = require('abab');
atob('SGVsbG8sIHdvcmxkIQ=='); // 'Hello, world!'
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
.
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');
If you're submitting a PR or deploying to npm, please use the checklists in CONTRIBUTING.md.
atob
and btoa
stand forBase64 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.FAQs
WHATWG spec-compliant implementations of window.atob and window.btoa.
The npm package abab receives a total of 14,454,716 weekly downloads. As such, abab popularity was classified as popular.
We found that abab demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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