Encoding and Decoding Strings with Base64 in Javascript

<script>
//btoa() takes a string and encodes it to Base64.
// Define the string
var decodedStringBtoA = 'Hello World!';

// Encode the String
var encodedStringBtoA = btoa(decodedStringBtoA);
console.log(encodedStringBtoA);


//atob() takes a string and decodes it from Base64.
// Define the string
var encodedStringAtoB = 'SGVsbG8gV29ybGQh';

// Decode the String
var decodedStringAtoB = atob(encodedStringAtoB);
console.log(decodedStringAtoB);
</script>