jQuery Performance Tips
5 min read
Cache selectors in variables, use event delegation, batch DOM changes, and prefer CSS transitions over $.animate(). Profile with Chrome DevTools Performance panel before optimizing to find actual bottlenecks.
Performance Best Practices
- Cache jQuery objects:
const $list = $('ul'); - Use event delegation for many elements
- Minimize DOM access — batch reads and writes
- Use
detach() for heavy DOM manipulation - Prefer CSS animations over jQuery animate
- Use
$.ajax with caching for repeated calls