5. Performance Optimization and Mobile Responsiveness
While GSAP is performant by default, optimization is essential for complex animations. It is crucial to maintain smoothness, especially on mobile devices.
5.1. Leveraging Hardware Acceleration (Using Transform Properties)
When animating, use only GPU-accelerated properties such as position (x, y), size (scale), rotation, and opacity. Avoid properties that trigger layout changes (e.g., width, height, top, left).
// GOOD: Uses GPU acceleration
gsap.to(".element", { duration: 1, x: 100, scale: 1.2 });
// AVOID: Causes CPU load
// gsap.to(".element", { duration: 1, width: 200, left: 50 });
5.2. Mobile Responsiveness and Optimization Checklist
- Conditional Animations: Use media queries or JavaScript's `matchMedia` to run simpler animations on mobile screen sizes and reserve complex animations for desktop only.
- Disable Tweens: On lower-performing devices, you can disable unnecessary animations using `gsap.killTweensOf()`.
- will-change property: Help the browser prepare layers by using the CSS `will-change` property just before the animation starts. (Note: Excessive use can lead to performance degradation.)
If you have completed all five steps, you are now ready to create powerful and optimized GSAP-based web animations.