JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://placehold.it/200" width="200" height="200" class="one" id="one" onClick="alert('f');fadeOut('one')">

JavaScript

var op = 1;
function fadeOut(element) {
    alert("d");
	el = document.getElementById(element);
    var op;
    op++
        if(op%2==0)
    el.style.opacity = 1;
    else
    el.style.opacity = 0;
  /*  var timer = setInterval(function () {
        if (op <= 0.1){
            clearInterval(timer);
        //    el.style.display = 'none';
            el.style.opacity = 0;
             el.style.opacity = el.style.opacity^1;
        }
        el.style.opacity = op;
        el.style.filter = "alpha(opacity=" + op * 100 + ")";
        op -= op * 0.2;
    }, 120);*/
}