What does HTML header do?

In HTML documents, titles are important.

HTML Title

Heading (Heading) is defined through 4a249f0d628e2318394fd9b75b4636b1 - 4e9ee319e0fa4abc21ff286eeb145ecc tags.

4a249f0d628e2318394fd9b75b4636b1 defines the largest heading. 4e9ee319e0fa4abc21ff286eeb145ecc Defines the smallest heading.

Example

<h1>这是一个标题。</h1>
<h2>这是一个标题。</h2>
<h3>这是一个标题。</h3>

Note: The browser will automatically add blank lines before and after the title.

Titles are important

Make sure to use the HTML title tag only for titles. Don’t use headings just to produce bold or large text.

Search engines use headers to index the structure and content of your web pages.

Because users can quickly navigate your web page through headings, it is important to use headings to present the structure of your document.

H1 should be used as the main heading (the most important), followed by h2 (the next most important), then h3, and so on.

HTML Horizontal Line

Thef32b48428a809b51f04d3228cdf461fa tag creates a horizontal line in an HTML page. The

hr element can be used to separate content.

Example

<p>这是一个段落。</p>
<hr>
<p>这是一个段落。</p>
<hr>
<p>这是一个段落。</p>

HTML comments

You can insert comments into HTML code, which can improve its readability and make the code easier to understand. The browser ignores comments and does not display them.

The comment is written as follows:

Example

<!-- 这是一个注释 -->

Comment: An exclamation point needs to be followed immediately after the opening bracket (the left bracket), and not before the closing bracket (the right bracket). , reasonable use of comments can help future code editing work. .

HTML Tips - How to View Source

Have you ever looked at some web page and marveled at how it was implemented?

If you want to find out the secret, just right-click and select "View Source" (IE) or "View Page Source" (Firefox). Other browsers do the same thing. Doing so will open a window containing the HTML code for the page.

【Related Recommendations】

1. Special Recommendation:"php Programmer Toolbox" V0.1 version Download

2. Free html online video tutorial

3. php.cn original html5 videotutorial

The above is the detailed content of What does HTML header do?. For more information, please follow other related articles on the PHP Chinese website!