how to add event listener 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 eventlistener

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

Example 4: event listener javascript

document.querySelector('div').addEventListener('click', () => {
  console.log('div clicked');
});

Example 5: event listener javascript

document.getElementById("myBtn").addEventListener("click", displayDate);

Example 6: js add event listener

function eventHandler(event) {
  if (event.type == 'fullscreenchange') {
    /* gestire un interruttore a schermo intero */
  } else /* fullscreenerror */ {
    /* gestire un errore di commutazione a schermo intero */
  }
}