how to optimize the performance of web pages? For front-end performance optimization, here are five tips for improving website loading speed: compress and merge files: compress HTML, CSS, JavaScript, and then merge them to reduce HTTP requests. Latency loading: loads content only when needed. lazy loading: images and other media are loaded only when the user scrolls the page. use caching: use browser caching to reduce resource loading time. compressed images: use compressed image formats, such as JPEG, to reduce file size and speed up loading. 1. Compress and merge files you can use tools and plug-ins (such as Gulp, Grunt, Webpack, and so on) to automatically compress and merge files. HTML compression: <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>HTML compression exampl</title> </head> <body> <h1>This is the title.</h1> <p>This is a passage.</p> </body> </html> CSS compression: body { background-color: #f8f8f8; font-family: Arial, sans-serif; font-size: 16px; } h1 { color: #333; font-size: 28px; } p { color: #666; font-size: 18px; } JavaScript compression: (function() { var message = "Hello World!"; console.log(message); }()); 2. Delayed loading delayed loading can be achieved using JavaScript. <img data-src="image.jpg" alt="Picture"> <script> // wait for the page to be fully loaded before executing the script window.onload = function() { // get all picture tags var images = document.querySelectorAll('img[data-src]'); // traversing the picture tag Array.prototype.forEach.call(images, function(image) { // modify src image.setAttribute('src', image.getAttribute('data-src')); }); }; </script> 3. Lazy load lazy loading can be implemented using JavaScript and plug-ins. Here we use the jQuery plug-in to implement lazy loading. <img data-src="image.jpg" alt="Picture"> <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.lazyload/1.9.1/jquery.lazyload.min.js"></script> <script> $(function() { $("img").lazyload({…
