fix browsers which don't support Base64 | btoa | atob
if you want to see how it works in browsers which don't support native base64 encoding; you can try this link in old browsers such as old IE.
just try this as native methods supported!
window.btoa('test');
window.atob('**');
you can also try this:
Base64.btoa()
Base64.atob()
Base64.encode()
Base64.decode()