A detailed discussion of HTML documents

HTML—Hypertext Markup Language, is a language used to create web pages. It is a markup language with many tags used to define the structure and content of the document. The basic structure of an HTML document includes document type declaration, html, head, title, body and other elements. In this article, we will discuss in detail how to create HTML documents, including the basic structure of the document, common HTML tags and coding specifications.

1. Basic structure of HTML document

Before creating an HTML document, the document type declaration (DTD) must be defined to tell the browser which HTML version to use to parse the document. The syntax is as follows:

The document type declaration must be placed before the html element. Next is the html element, which defines the root element of the entire HTML document. The html element has two required child elements: head and body. The head element contains the document's metadata, such as title, meta, link, etc. The body element defines the main part of the HTML document and contains various elements such as text, images, links, tables, etc.

The following is the basic structure of an HTML document:

<title>网页标题</title>
<meta>

head>

<!-- 网页主体内容 -->

2. HTML tag

HTML tag is an HTML document The basic building blocks that define the content and structure of a document. Tags usually appear in pairs, where the first tag is called the start tag and the second tag is called the end tag. Between the two tags is the content contained in the tag. The following are some commonly used HTML tags and their uses:

1. Title tag - used to define the title of the web page. The largest title uses the h1 tag, and h2 to h6 represent different levels of titles.

Title 1

Title 2

Title 3

Title 4

Heading 5

Heading 6

2. Paragraph tag - used to define the paragraphs of the web page.

This is a paragraph.

3. Link tag - used to add hyperlinks to web pages.

Link text

4. Image tag - used to add images to web pages.

5. List tag - used to define an ordered or unordered list.

1. List item 1


2. List item 2


3. List item 3

• 
  
• List item 2


• List item 3

The above are only some of the applications of HTML tags. You can learn more about the usage of HTML tags by consulting relevant information on the HTML language.

3. Coding specifications

1. Indentation specifications: Any block element should start on a new line and be indented one level.

2. Tag specifications: For tags that have no closing tag or two adjacent tags without spaces, use "/" after the closing tag name to close the tag.

3. Attribute specification: The value of the attribute should be enclosed in double quotes instead of single quotes.

4. Comment specifications: There are two kinds of comments in HTML, one is a line comment, starting with ""; the other is a paragraph comment, Add "" after the comment content.

To sum up, the method of creating HTML documents is very simple. As long as you understand the basic structure of the document and common HTML tags, you can easily create your own website and add various functions. At the same time, you must also pay attention to comply with HTML coding standards to ensure the best display effect of web pages.

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