The EventListener
interface represents an object that can handle an event dispatched by an EventTarget
object.
Due to the need for compatibility with legacy content, EventListener
accepts both a function and an object with a handleEvent
property function. This is shown in the example below.
This interface neither implements, nor inherits, any properties.
This interface doesn't inherit any methods.
EventListener.handleEvent()
<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!'); } });
Specification | Status | Comment |
---|---|---|
DOM The definition of 'EventListener' in that specification. | Living Standard | No change. |
Document Object Model (DOM) Level 2 Events Specification The definition of 'EventListener' in that specification. | Obsolete | Initial definition. |
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https://developer.mozilla.org/en-US/docs/Web/API/EventListener