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Javascript Base64 Encode, Decode for UTF-8/unicode string

Complete article that works for me : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Base64_encoding_and_decoding 

Part where we encode from unicode/utf-8 is

function utf8_to_b64( str ) {
  return window.btoa(unescape(encodeURIComponent( str )));
}

function b64_to_utf8( str ) {
  return decodeURIComponent(escape(window.atob( str )));
}

// Usage:
utf8_to_b64('✓ à la mode'); // "4pyTIMOgIGxhIG1vZGU="
b64_to_utf8('4pyTIMOgIGxhIG1vZGU='); // "✓ à la mode"

 This is one of most used thing now a days.

By Sumit Gupta

Sumit Gupta, born on 7th Feb 1981 in NCR, India. He lives a quiet life until he turn to a developer. Once he is in his professional life people start recognizing him for his work. Sumit Gupta is always keen to learn more and share his knowledge to anyone who deserve it. His goal of life is to code at least one 3D action game by itself or with his company Vikasumit [http://www.vikasumit.com].

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