The code doesn't work. why?

Question

JavaScript

let el = document.querySelectorALL('.thumb li');
    for (let i = 0; i < el.length; i++){
      el[i].onclick = function(){
        var c = 0;
        while (c < el.length){
          el[c++].className = 'check';
        }
        el[i].className = 'check active';
      }
    }

Code not working, can't figure out why, please help

Answer 1

querySelector ALL > querySelector All