add eventlistener to button javascript code example

Example 1: javascript onclick event listener

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

Example 2: javascript pass parameter to event listener

var someEventHander=function(){
	console.log(event,param1,param2);
}
//add listener
document.getElementById("someid").addEventListener('click',someEventHander.bind(event,param1,param2));

Example 3: javascript eventlistener

document.addEventListener('click', () => {
    
});

Example 4: javascript event listener

element.addEventListener("click", function(){ 
   element.innerText = "something"; 
});