javascript convert to base64 encode code example

Example 1: javascript base64 encode

var string = "Hello folks how are you doing today?";
var encodedString = btoa(string); // Base64 encode the String
var decodedString = atob(encodedString); // Base64 decode the String

Example 2: javascript base64 encode file input

var fileInput = document.getElementById('#myInputID');

var reader = new FileReader();
reader.readAsDataURL(fileInput.files[0]);

reader.onload = function () {
	console.log(reader.result);//base64encoded string
};
reader.onerror = function (error) {
	console.log('Error: ', error);
};