Base64 encoding and decoding in client-side Javascript

Question

Are there any methods in JavaScript that could be used to encode and decode a string using base64 encoding?

Answer 1

In Node.js we can do it in simple way

var base64 = 'SGVsbG8gV29ybGQ='
var base64_decode = new Buffer(base64, 'base64').toString('ascii');

console.log(base64_decode); // "Hello World"