It's the second reference implementation of an encoder and decoder for Base32H, a new(-ish) base-32 number representation, written as a package for NPM (but should work in any reasonably-modern Javascript implementation).

Run npm install @base32h/base32h in your project directory, or just yank base32h.js right out of this repo and stick it wherever.

It's one of them fancy "UMD" libraries, so you can do something along the lines of var base32h = require('base32h') if you're using this in Node, or simply include it as a script file on some page if you're using this from the browser (and base32h will be available from other scripts on the page).

Either way, once it's loaded:

base32h.encode(17854910);
// -> "H0WDY"

base32h.encodeBin([227,169,72,131,141,245,213,150,217,217]);
// -> "WELLH0WDYPARDNER"

base32h.decode('88pzd');
// -> 8675309

base32h.decodeBin('2060W2G6009');
// -> [ 0, 0, 0, 8, 6, 7, 5, 3, 0, 9 ]

Yep! Just follow the terms of the ISC license (see COPYING in this repo).