EventListener

The EventListener interface represents an object that can handle an event dispatched by an EventTarget object.

This interface neither implements, nor inherits, any properties.

This interface doesn't inherit any methods.

EventListener.handleEvent()

A function that is called whenever an event of the specified type occurs.

<button id="btn">Click here!</button>

const buttonElement = document.getElementById('btn');

// Add a handler for the 'click' event by providing a callback function.
// Whenever the element is clicked, a pop-up with "Element clicked!" will
// appear.
buttonElement.addEventListener('click', function (event) {
  alert('Element clicked through function!');
});

// For compatibility, a non-function object with a `handleEvent` property is
// treated just the same as a function itself.
buttonElement.addEventListener('click', {
  handleEvent: function (event) {
    alert('Element clicked through handleEvent property!');
  }
});

• addEventListener