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One of the biggest things that excites me about HTML5 is that it implements new features and features that we’ve been waiting for for a long time. For example, I’ve been using placeholders before, but had to do it in JavaScript. The async attribute provided to JavaScript tags in HTML5 enables JavaScript to be loaded

Today, I will recommend a few recommended practices for writing JavaScript asynchronous code. Each scenario has a corresponding eslint rule, and you can choose to configure it. no-async-promise-executor Passing an async function to the constructor of new Promise is not recommended. // ❌ new Promise(async (resolve, reject) => {}); // ✅ new Promise((resolve, reject) =>

Follow me on Twitter, I’d love to hear your suggestions for themes or improvements /Chris You may be completely new to JavaScript , or you may have only used it sporadically over the years. One thing is clear though – a lot has changed, and there are some features you should use. This post describes

CSS files are render-blocking resources : they must be loaded and processed before the browser can render the page. Web pages that contain unnecessarily large styles take longer to render. In this guide, you’ll learn how to lazy load non-critical CSS with the goal of optimizing the critical rendering path and improving First Contentful Paint

Star the front-end canteen and eat every meal! Because of the change in the recommendation mechanism of the official account, if you don’t want to miss the articles of the cafeteria, you can set the cafeteria as a star, so that it will appear in the top list of your official account. Set star method:

To improve page load speed, you can defer CSS and JavaScript resources by adjusting only the HTML code of the page. Delay CSS delayed media Delay JavaScript Resources such as CSS, fonts, and JavaScript are considered render-blocking . This means that the browser needs time to load page content before it actually renders them. So

1. Introduction to CORS for Cross-Origin Resource Sharing The entire CORS communication process is automatically completed by the browser and does not require user participation. The key to implementing CORS communication is the server. Cross-origin communication is possible as long as the server implements the CORS interface. The OPTIONS request is a preflight request ,

When I first entered the industry, I learned about macro tasks and micro tasks, which were also written in other people’s blogs. After working for more than a year, I have a little understanding of js! I went to understand the event loop, the task queue, and slowly it gave me the feeling that there

Hello everyone, I’m Fei Ge! Recently, I briefly studied the low-latency network architecture and shared it with you today. When it comes to an excellent low-latency network architecture, the first thing that comes to mind is the Internet giants, such as Tencent Alibaba Bytes. They always feel that the big companies must do the best.