in React applications, as the number of components increases, so does the size of the application. This may cause the application to load for too long and bring a bad experience to the user. To solve this problem, we can use component-level demand loading. On-demand loading can improve application performance, reduce page loading time, and improve user experience. In this blog post, I will detail how to implement component-level on-demand loading in React. what is demand loading? on-demand loading (also known as lazy loading) is a technique that allows us to delay loading code until it really needs to be executed. In React applications, demand loading allows us to load components or other resources dynamically when needed, rather than when they are initially loaded. This means that applications can start faster, reduce unnecessary network requests and file sizes, and improve performance and response speed. Why use demand loading? the main reason for using demand loading in React applications is to improve performance and user experience. When we use demand loading, we only load code when needed, not all code when the application starts. This can reduce page loading time and network requests, and improve application response speed and user satisfaction. In addition, demand loading can reduce the file size of the application because we only need to load the necessary code and resources. implementation of demand loading React supports a variety of ways to load components on demand, including using React.lazy and Suspense API, using higher-level components, and using dynamic imports. Now I will introduce the usage of each method…
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({…
