when I use document.write function and I want to when this event happens some CSS is working on but I can not add CSS while using classlist.
var login = document.getElementById('login');
var sign = document.getElementById('sign');
login.addEventListener('click', function () {
var name1 = document.getElementsByClassName('name')[0].value;
var pass = document.getElementsByClassName('name')[1].value;
var chan = document.writeln(name1);
chan.classList.add('change');
var chan2 = document.write(pass);
});