const secretMes1 = "How's%20it%20going%3F";    
const secretMes2 = "How's it going?";
const decodedComp = decodeURIComponent(secretMes1);
console.log(decodedComp);
const encodedComp = encodeURIComponent(secretMes2);
console.log(encodedComp);
const uri = "http://www.basescripts.com?=Hello World";
const encoded = encodeURI(uri);
console.log(encoded);

How's it going?
How's%20it%20going%3F
http://www.basescripts.com?=Hello%20World