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.

Experiment goes wrong

My blog was recently been taken out. I was experimenting on my Azure server that host the blog and accidently leave a unsecure port open on my server. Result, server was over used by hacker and Azure close me down. That is really nice of them that they did close me, because otherwise I might not know what is going wrong with my hosting as these things are easily ignored.

But I am back and close all issues and hope to continue with more precaution now on.