Shulou(Shulou.com)06/01 Report--

Today, I will talk to you about what the principle of HTML parsing is. Many people may not know much about it. In order to let everyone know more, Xiaobian summarizes the following contents for everyone. I hope everyone can gain something according to this article.

HTML Parsing Principles

The standard web front-end engineer needs to know how the browser (or corresponding player) renders/redraws.

I'm gonna have to work on that. I really didn't say it very clearly. I just G, but the result wasn't many. I found one, so I wrote it down...

The following is from Handawei-Javaeye's blog:

Web pages run in a variety of browsers, and the speed at which browsers load and render pages directly affects the user experience

Simply put, page rendering is the process by which the browser displays html code in the browser window according to rules defined by CSS. Let's start by understanding how browsers work:

1. The user enters the URL (assuming it is an html page and it is the first visit), the browser sends a request to the server, and the server returns the html file;

2. The browser starts loading html code and finds a tag within the tag that references an external CSS file;

3. The browser requests a CSS file, and the server returns the CSS file.

4. browser continues to load html

Part of the code, and CSS files have been obtained, you can start rendering the page;

5. The browser finds a tag in the code that references an image and sends a request to the server. At this point the browser does not wait until the image is downloaded, but continues to render the code behind;

6. The server returns the image file, because the image occupies a certain area, affecting the arrangement of the following paragraphs, so the browser needs to go back and re-render this part of the code;

7. The browser found a Javascript code containing one line.

After reading the above content, do you have a further understanding of what HTML parsing principle is? If you still want to know more knowledge or related content, please pay attention to the industry information channel, thank you for your support.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.