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Within this parent div are several child button elements that, when clicked, create a pretend food item (that is, the console.log's). She has a single parent div with an onClick event handler that, when clicked, calls everyone to the table to eat her food. Let’s say we know a girl named Molly, who also happens to be not a real person, but - 🥁drum roll - a React component. To stop this from happening , a method on the event object must be called.īubbling and capturing (explained later) allow us to implement the event delegation pattern.

Once an inner child element’s event is called, all elements above/below it will also be called (bubbling/capturing).

This technique is generally considered performant since only one event listener function is being used at the top-level parent rather than one for every child element.

Long story short, event delegation is simply put a powerful JavaScript technique that allows more efficient event handling.

✨ Special Edge Case: What If You Need an Outer Parent to Fire too?.

✨ Event Listeners In React Version 16 and before VS Version 17+.

✨ Which Events Do Not Bubble and How Are They Handled?.

✨ Updated Event Firing Order and useCapture Param in JavaScript.

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✨ How to Stop Event Bubbling in Your Components.✨ How Event Bubbling Happens in JavaScript.

Once you've gone through this thorough introduction to event bubbling and event caching, you should be able to start applying what you've learned here in your projects right away.

I created this resource to help you understand event propagation and how it works in JavaScript and React in a clear and comprehensible way. In this article, I'll help you understand event bubbling and event catching like a pro.