JAVASCRIPT

js addeventlistener click

document.getElementById("ELEMENT_ID").addEventListener("click", function() {
  //insert here the code to be executed
});

add click event listener javascript

//html
<button>My Button</button>

document.querySelector("button").addEventListener('click', handlClick);

function handlClick() {
    alert("I got clicked!")
}

event listener click

addEventListener('click', (event) => {});

onclick = (event) => { };

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 */
  }
}