In JavaScript, an event handler is a function that runs whenever a specific event occurs on an element in the web page. Events can be anything like a user clicking a button, pressing a key, or even hovering over a specific part of the page! 🖱️💻
Event handlers make web pages interactive and dynamic. Without them, your web page would be static and unresponsive, like a picture on the wall! 🖼️ Event handlers let JavaScript react to user actions, giving life to your website. ✨
When a user interacts with a web page (for example, by clicking a button), the browser generates an event. JavaScript then listens for this event using an event listener and responds with an event handler function.
- Event Listener: A security camera that watches for specific activities (e.g., clicks, keystrokes) 👀.
- Event: The activity the camera is watching for, like someone entering a room (e.g., click, scroll) 🚶.
- Event Handler: The action the system takes when it detects the activity, like turning on the lights 💡.