btoa === A port of the browser's `btoa` function. Uses `Buffer` to emulate the exact functionality of the browser's btoa (except that it supports unicode and the browser may not). It turns binary data __to__ base64-encoded ascii. (function () { "use strict"; var btoa = require('btoa') , bin = "Hello, 世界" , b64 = btoa(bin) ; console.log(b64); // "SGVsbG8sIBZM" }()); Note: Unicode may or may not be handled incorrectly. Copyright and license === Code and documentation copyright 2012-2014 AJ ONeal Tech, LLC. Code released under the [Apache license](https://github.com/node-browser-compat/btoa/blob/master/LICENSE). Docs released under [Creative Commons](https://github.com/node-browser-compat/btoa/blob/master/LICENSE.DOCS).