How do you optimize the performance of a JavaScript web application?

First and foremost, minimizing and bundling files is a strategy I prioritize. By using tools like Webpack or Rollup, I consolidate all JavaScript files into a single bundle, reducing the number of HTTP requests needed to fetch resources. This practice, coupled with minification, which removes unnecessary characters from code without changing its functionality, significantly improves load times.

Another vital aspect is optimizing images and lazy loading. Images often account for most of the downloaded bytes on a web page. Therefore, ensuring images are properly sized, compressed, and served in next-gen formats like WebP can drastically reduce load times. Lazy loading, on the other hand, involves loading images or content only when they're needed as the user scrolls, which enhances the initial load time....