Member-only story
Events are essential in web development. When a user clicks a button, submits a form, or hovers over an element, we need to respond to those actions by running some JavaScript code. But how exactly do those events get handled? This is where event propagation comes in.
Event propagation refers to how events travel through the DOM tree after being triggered. There are two main propagation methods:
- Bubbling — The event is first captured and handled by the innermost element and then propagated to outer elements.
- Capturing — The event is first captured by the outermost element and propagated to the inner elements.
Understanding event flow is crucial for implementing event handlers and preventing unexpected behavior in our applications. In this article, we’ll take a closer look at how event bubbling and capturing works in JavaScript.
The Basics of Event Propagation
When an event occurs on an element, the browser generates an event object and propagates it through the DOM tree. This allows parent elements to also listen for events happening on their child elements.
