how to rot13 code example
Example: rot13 js
// best
function rot13(message) {
var a = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
var b = "nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM";
return message.replace(/[a-z]/gi, (c) => b[a.indexOf(c)]);
}