👀 Views: 54 💬 Answers: 1 📅 Created: 2025-09-24

jquery performance mobile JavaScript

I'm maintaining legacy code that I recently switched to I'm learning this framework and Could someone explain I tried several approaches but none seem to work. Building an application that heavily relies on jQuery for animations and transitions, I've noticed significant performance issues when tested on mobile devices. For instance, using `.fadeIn()` and `.slideUp()` on elements with complex DOM structures leads to janky animations and high CPU usage, which affects user experience. Here's a snippet of what I have: ```javascript $('.element').fadeIn(400).slideUp(300); ``` While this works well on desktops, on mobile, it feels sluggish and unresponsive. I've tried reducing the number of animated elements at once and using CSS transitions instead of jQuery animations, but the problem persists. Switching to CSS animations improved performance somewhat, yet I need a more comprehensive solution that maintains the ease of jQuery for managing animations. In an attempt to enhance performance, I also profiled the application using Chrome DevTools and observed high repaint times during animations. The `requestAnimationFrame()` method was another consideration, but I'm unsure how to effectively integrate it with my current jQuery animations. Here's an example of how it looks: ```javascript function animate() { $('.element').css('opacity', 1); requestAnimationFrame(animate); } animate(); ``` However, this approach feels clunky and I'm worried it won't blend well with the existing jQuery codebase. Looking for guidance on best practices specifically tailored for mobile compatibility when using jQuery for animations. Is there a way to strike a balance between jQuery's simplicity and mobile performance? Any insights on optimizing such animations or restructuring my approach would be greatly appreciated. For context: I'm using Javascript on macOS. This is for a mobile app running on macOS. I'm coming from a different tech stack and learning Javascript. This issue appeared after updating to Javascript LTS. Any ideas what could be causing this?