digideskio / string.fromcodepoint

A robust & optimized `String.fromCodePoint` polyfill, based on the ECMAScript 6 specification.

ES6 String.fromCodePoint polyfill

An robust & optimized ES3-compatible polyfill for the String.fromCodePoint method in ECMAScript 6.

Other polyfills for String.fromCodePoint are available:

• http://norbertlindenberg.com/2012/05/ecmascript-supplementary-characters/#String by Norbert Lindenberg (passes all tests)
• https://gist.github.com/slevithan/2290602 by Steven Levithan (fails 8 tests)
• https://github.com/paulmillr/es6-shim/blob/771e98e789292706d2435e4e10ffbe45edf40da6/es6-shim.js#L63-L83 by Paul Miller (passes all tests)

Installation

In a browser:

<script src="fromcodepoint.js"></script>

Via npm:

npm install string.fromcodepoint

Then, in Node.js:

require('string.fromcodepoint');

// On Windows and on Mac systems with default settings, case doesn’t matter,
// which allows you to do this instead:
require('String.fromCodePoint');

Notes

A polyfill + test suite for String.prototype.codePointAt is available, too.

The tests for this repository are now used by Mozilla, to help ensure their native String.fromCodePoint implementation is correct.

Author

Mathias Bynens

License

This polyfill is available under the MIT license.