title: base 64 encode and decode a string in angular (2+)
body: <p><strong><em>How to encode or decode a string in angular 2 with base64 ???</em></strong>
  My front-end tool is Angular 2. I had a password string, before passing it to API I need to base64 encode. Since in service base64 encoded string will be decoded.</p>
  
  <p>So I am looking for some base64 encode/decode library for Angular2/Typescript and some options.</p>
  
  <p>Thanks!!!</p>