[PDF] define event handling in javascript

What is event handler in JavaScript?

Event handlers can be used to handle and verify user input, user actions, and browser actions: And more ... Many different methods can be used to let JavaScript work with events: You can assign your own event handler functions to HTML elements And more ...

What is a JavaScript event?

An HTML event can be something the browser does, or something a user does. Often, when events happen, you may want to do something. JavaScript lets you execute code when events are detected. HTML allows event handler attributes, with JavaScript code, to be added to HTML elements.

What is event handling?

That is event handling! The "event" here is a new JS meetup. When a new meetup is posted, the website meetup.com catches this change, thereby "handling" this event. It then notifies you, thus taking an "action" on the event. In a browser, events are handled similarly.

What is registering an event handler?

When such a block of code is defined to run in response to an event, we say we are registering an event handler . Note: Event handlers are sometimes called event listeners — they are pretty much interchangeable for our purposes, although strictly speaking, they work together.