Through network requests, resource loading, JavaScript execution and rendering optimization, the performance of H5 pages can be improved and a smooth and efficient page can be created: resource optimization: compressed images (such as using tinypng), simplified code, and enabled browser caching. Network request optimization: merge files, use CDN, and load asynchronously. JavaScript optimization: reduce DOM operations, use requestAnimationFrame, and make good use of virtual DOM. Advanced skills: code segmentation, server-side rendering.

H5 page performance optimization: Make your page fly

Have you ever been worried about the slow loading of H5 pages and the bad user experience? This article will explore various tips for H5 page performance optimization so that you no longer get crazy about performance issues. After reading it, you will master a series of practical methods to create a smooth and efficient H5 page, improve user satisfaction, and make your page truly "fly".

Let’s start with the basics. The performance bottlenecks of H5 pages usually come from network requests, resource loading, JavaScript execution and rendering. We must understand that the performance perceived by users is not simply loading time, but also the fluency of page interaction. A page that seems to load very quickly, and if the interaction is stuttered, the user experience is still poor.

Resource optimization: small body, big energy

Image compression is the top priority. Don't be foolish with giant uncompressed pictures. Using tools like tinypng can significantly reduce the size of the picture while maintaining good visual quality. Going further, consider using the WebP format, which is smaller in size at the same mass. For icons, using SVG vector images, you can scale arbitrarily without distortion.

In terms of code, it is crucial to streamline HTML, CSS, and JavaScript code. Removing redundant code and compressing CSS and JavaScript files can effectively reduce file size and speed up loading. Don't forget to enable browser caching, so that the browser can cache commonly used resources and reduce duplicate requests.

Network request optimization: less is more

Reducing the number of HTTP requests is crucial. Merging CSS and JavaScript files and using CSS Sprites to merge small pictures are all effective methods. Use CDN rationally and distribute static resources to all over the world, allowing users to obtain resources from the nearest servers and reduce latency.

Asynchronous loading is another key. Load non-critical resources asynchronously to avoid blocking page rendering. For example, you can preload critical resources using <link rel="preload"> or <link rel="prefetch"> , or load JavaScript files asynchronously using async and defer properties.

JavaScript optimization: lightweight

JavaScript execution efficiency directly affects the smoothness of page interaction. Avoid using too many DOM operations and minimize page redrawing and rearrangement. Use requestAnimationFrame for animation rendering to optimize animation performance. Make good use of virtual DOM and reduce the number of times you directly operate the real DOM, such as using frameworks such as React and Vue.

Code example: Take a look

Here is a simple code example showing how to load JavaScript files asynchronously using the async attribute:

 <code class="html"><script src="script.js" async></script></code>

This simple example can improve page loading speed and avoid blocking page rendering.

More advanced skills: The way to advance

For complex H5 pages, you can consider using code segmentation, splitting the code into multiple small modules, and loading on demand. This can effectively reduce the initial loading volume and improve the page loading speed. You can also use server-side rendering (SSR) to render the page to HTML on the server and then send it to the client to reduce the workload of client rendering.

Trapped with pits and experiences: Lessons from blood and tears

There was once a project that because of insufficient image compression, the page loading time was too long and the user experience was extremely poor. Later, we used WebP format and compressed the images more strictly, and the problem was solved. Another project, because the JavaScript code is too bloated, causing page interaction to stutter. We finally improved the page performance through code refactoring and optimization. Remember, performance optimization is an ongoing process that requires constant monitoring and adjustment.

Remember, there is no silver bullet for performance optimization, and all aspects need to be considered comprehensively. Select the optimization strategy that suits your project to achieve the best results. Only by constantly learning and practicing can you become a true H5 performance optimization master!

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