How does html work?

HTML is a markup language used to create and design web pages. It describes web page content through tags, attributes and elements, and can be run and displayed by a browser. This article will introduce the running process of HTML in detail.

1. The grammatical structure of HTML

HTML language is composed of tags, attributes and elements. These elements are usually wrapped by angle brackets. The tags can be single tags or double tags. Taking double tags as an example, HTML tags usually consist of a start tag and an end tag . The start tag contains the name of the tag and any number of attributes, and the end tag only contains the tag name. For example:

<p id="example">这是一个段落</p>

Among them, "

" is a paragraph tag, the "id" attribute is used to specify the ID of the paragraph as "example", and "

" is an end tag, indicating the content of the paragraph end.

2. HTML running process

HTML running process can be divided into the following three steps:

1. Write HTML code

When writing HTML code, you need to write it according to HTML syntax rules. You can use a text editor or an HTML editor. A text editor is a simple editor that usually has no interface and only displays text; while an HTML editor provides richer functions, such as code prompts, code inspection, and code highlighting.

2. Browser parsing HTML code

After the HTML code is written, it needs to be parsed by the browser. The browser will automatically read the HTML code and convert it For visual web pages. In the process of parsing HTML code, the browser will interpret the code according to HTML syntax rules and convert it into the structure, style and function of the web page.

In the process of parsing HTML code, the browser needs to determine the structure and layout of the web page based on tag names, attributes, and elements, and determine the style and appearance of the web page based on CSS. In addition, browsers rely on JavaScript code to determine the functionality and behavior of web pages.

3. Web page display and interaction

When the browser completes parsing the HTML code, the web page can be displayed in the browser window. During the process of displaying a web page, the browser will convert the HTML code into the structure, style and function of the web page, and realize the interaction and response of the web page according to the user's operations.

For example, when you click a button or link on a web page, the browser will perform operations such as jumping, refreshing, or popping up a dialog box based on JavaScript code. When a form is submitted on a web page, the browser sends the form data to the server and receives and displays the data returned by the server.

Summary

Through the above introduction, you can understand the running process of HTML, which consists of three steps: writing HTML code, browser parsing HTML code, and web page display and interaction. Writing correct HTML code is an important condition for ensuring the normal display and operation of web pages. At the same time, when designing and developing web pages, it is necessary to consider the structure, style and function of the web page, and use appropriate technologies and tools to achieve interaction and response on the web page.

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