add event listener in html code example

Example 1: javascript onclick event listener

document.getElementById("myBtn").addEventListener("click", function() {
  alert("Hello World!");
});

Example 2: javascript addeventlistener

var element = document.getElementById("#id");
element.addEventListener('click', function(){
	console.log("click");
});

Example 3: javascript addeventlistener

//with jQuery
$("#id / .class").on('click', function(){
	console.log("click");
});