Answers for "js check is base64 encode"

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

js check if string is base64

function isBase64(str) {
    if (str ==='' || str.trim() ===''){ return false; }
    try {
        return btoa(atob(str)) == str;
    } catch (err) {
        return false;
    }
}

js base64 encoding

str = "The quick brown fox jumps over the lazy dog";
b64 = btoa(unescape(encodeURIComponent(str)));
str = decodeURIComponent(escape(window.atob(b64)));