is clicked javascript code example

Example 1: javascript onclick button

var button = document.querySelector('button');
button.onclick = function() {
  //do stuff
}

Example 2: element clicked js

document.addEventListener('click', function(e) {
    e = e || window.event;
    var target = e.target || e.srcElement,
        text = target.textContent || target.innerText;   
}, false);