JSFiddle - React, Tailwind, and code Playground

JavaScript

var strAlphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz#@!$";

var strRandomPass = "";

for (i=0; i<14; i++) { 
    var intRandomNumber = (Math.random() * strAlphabet.length - 1);
    strRandomPass = strRandomPass + strAlphabet.substr(intRandomNumber, 1);   
}

alert(strRandomPass);