# Event Listener

A callback registered to run when a particular event occurs.

## What is **Event Listener** in JavaScript?

**Event Listener** — A callback registered to run when a particular event occurs.

```javascript
button.addEventListener("click", event => {
    const clickedButton = event.target;
});
```

Level: Journeyman · [More JavaScript terms at this level](https://www.ask-codey.com/glossary/subjects/javascript/journeyman)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/event-listener