Mastering JavaScript&#s Event Delegation

王林
Release: 2024-09-03 22:55:23
Original
564 people have browsed it

Mastering JavaScript

Event Delegation is a lesser-known JavaScript technique that can boost your web app’s performance.

Instead of attaching event listeners to multiple elements, you can leverage a single listener on a common parent element to handle events for all its children.

This technique reduces memory usage and improves efficiency by minimizing the number of event listeners in your app.

Example:

document.getElementById('parentElement').addEventListener('click', (event) => { if (event.target.matches('button')) { console.log('Button clicked!'); } });
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By attaching a single listener to the parent, you handle clicks for all child buttons with just one function! It’s a great way to make your code more efficient and maintainable.


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