- Cache DOM queries: When selecting elements, cache the results in a variable, so you don’t have to query the DOM multiple times.
- Reduce the number of queries: Combine multiple queries into a single query wherever possible.
- Use documentFragment: Use documentFragment to manipulate multiple elements at once, reducing the number of DOM manipulations.
Use Efficient Data Structures:
- Use arrays instead of objects: Arrays are faster than objects because they are optimized for sequential access.
- Use object literals instead of constructors: Object literals are faster to create than constructors.
- Avoid nested loops: Nested loops can be expensive. Use efficient data structures like maps or sets instead of nested loops.
Use Event Delegation:
Event delegation is a technique that allows you to handle events on a parent element instead of individual child elements. This reduces the number of event listeners and improves performance. To use event delegation, follow these steps:
- Add an event listener to the parent element.
- Check the event target to see if it matches the child element you’re interested in.
- Handle the event if the target matches.
- Use the transition property to define the animation.
- Use the animation property to define more complex animations.
- Use the transform property to create hardware-accelerated animations.
- Choose a framework that fits your needs.
- Learn the framework’s best practices.
- Use the framework’s tools and components to optimize performance.