EventListener

interface

interface EventListener

Call signatures

`Call signature`

(evt: Event): void

The EventListener interface represents a callback function to be called whenever an event of a specific type occurs on a target object.

This is a basic event listener, represented by a simple function that receives an Event object as its only parameter.

Example

// Create an event listener function
const handleEvent = (event: Event) => {
  console.log(`Event of type "${event.type}" occurred`);
  console.log(`Event phase: ${event.eventPhase}`);

  // Access event properties
  if (event.cancelable) {
    event.preventDefault();
  }
};

// Attach the event listener to a target
const target = new EventTarget();
target.addEventListener('custom', handleEvent);

// Or create a listener inline
target.addEventListener('message', (event) => {
  console.log('Message received:', event);
});