HTML <h1> – <h6> 元素 represent six levels of section headings. <h1> is the highest section level and <h6> is the lowest.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

内容类别	流内容 , heading content, palpable content.
准许内容	措词内容 .
Tag omission	None, both the starting and ending tag are mandatory.
Permitted parents	Any element that accepts flow content ; don't use a heading element as a child of the <hgroup> element — it is now deprecated.
Implicit ARIA role	heading
Permitted ARIA roles	tab , presentation or none
DOM 接口	HTMLHeadingElement

属性

These elements only include the 全局属性 .

align attribute is obsolete; don't use it.

用法注意事项

• Heading information can be used by user agents to construct a table of contents for a document automatically.
• Avoid using heading tags to resize text. Instead, use the CSS font-size 特性。
• Avoid skipping heading levels: always start from <h1> , followed by <h2> 依此类推。
• Use only one <h1> per page or view. It should concisely describe the overall purpose of the content.
• Using more than one <h1> will not result in an error, but is not considered a best practice. It is beneficial for screenreader users, and SEO .
• While HTML5 allows a <h1> per sectioning element , it is not considered best practice, and may subvert the expectations of how screen reader users navigate.

范例

All headings

The following code shows all the heading levels, in use.

<h1>Heading level 1</h1>
<h2>Heading level 2</h2>
<h3>Heading level 3</h3>
<h4>Heading level 4</h4>
<h5>Heading level 5</h5>
<h6>Heading level 6</h6>

Here is the result of this code:

Example page

The following code shows a few headings with some content under them.

<h1>Heading elements</h1>
<h2>Summary</h2>
<p>Some text here...</p>
<h2>Examples</h2>
<h3>Example 1</h3>
<p>Some text here...</p>
<h3>Example 2</h3>
<p>Some text here...</p>
<h2>See also</h2>
<p>Some text here...</p>

Here is the result of this code:

可访问性关注

导航

A common navigation technique for users of screen reading software is jumping from heading to heading to quickly determine the content of the page. Because of this, it is important to not skip one or more heading levels. Doing so may create confusion, as the person navigating this way may be left wondering where the missing heading is.

Don't

<h1>Heading level 1</h1>
<h3>Heading level 3</h3>
<h4>Heading level 4</h4>

Do

<h1>Heading level 1</h1>
<h2>Heading level 2</h2>
<h3>Heading level 3</h3>

Nesting

Headings may be nested as subsections to reflect the organization of the content of the page. Most screen readers can also generate an ordered list of all the headings on a page, which can help a person quickly determine the hierarchy of the content:

1. h1 Beetles
   1. h2 Etymology
   2. h2 Distribution and Diversity
   3. h2 Evolution
      1. h3 Late Paleozoic
      2. h3 Jurassic
      3. h3 Cretaceous
      4. h3 Cenozoic
   4. h2 External Morphology
      1. h3 Head
         1. h4 Mouthparts
      2. h3 Thorax
         1. h4 Prothorax
         2. h4 Pterothorax
      3. h3 Legs
      4. h3 Wings
      5. h3 Abdomen

When headings are nested, heading levels may be "skipped" when closing a subsection.

• Headings • Page Structure • WAI Web Accessibility Tutorials
• MDN Understanding WCAG, Guideline 1.3 explanations
• Understanding Success Criterion 1.3.1 | W3C Understanding WCAG 2.0
• MDN Understanding WCAG, Guideline 2.4 explanations
• Understanding Success Criterion 2.4.1 | W3C Understanding WCAG 2.0
• Understanding Success Criterion 2.4.6 | W3C Understanding WCAG 2.0
• Understanding Success Criterion 2.4.10 | W3C Understanding WCAG 2.0

Labeling section content

Another common navigation technique for users of screen reading software is to generate a list of 区间内容 and use it to determine the page's layout.

Sectioning content can be labeled using a combination of the aria-labelledby and id attributes, with the label concisely describing the purpose of the section. This technique is useful for situations where there is more than one sectioning element on the same page.

范例

<header>
  <nav aria-labelledby="primary-navigation">
    <h2 id="primary-navigation">Primary navigation</h2>
    <!-- navigation items -->
  </nav>
</header>
<!-- page content -->
<footer>
  <nav aria-labelledby="footer-navigation">
    <h2 id="footer-navigation">Footer navigation</h2>
    <!-- navigation items -->
  </nav>
</footer>

In this example, screen reading technology would announce that there are two <nav> sections, one called "Primary navigation" and one called "Footer navigation". If labels were not provided, the person using screen reading software may have to investigate each nav element's contents to determine their purpose.

• Using the aria-labelledby attribute
• Labeling Regions • Page Structure • W3C WAI Web Accessibility Tutorials

规范

规范	状态	注释
HTML 实时标准 The definition of '<h1>, <h2>, <h3>, <h4>, <h5>, and <h6>' in that specification.	实时标准
HTML5 The definition of '<h1>, <h2>, <h3>, <h4>, <h5>, and <h6>' in that specification.	推荐
HTML 4.01 Specification The definition of '<h1>, <h2>, <h3>, <h4>, <h5>, and <h6>' in that specification.	推荐

浏览器兼容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
h1	Chrome 完整支持 Yes	Edge 完整支持 12	Firefox 完整支持 1	IE 完整支持 Yes	Opera 完整支持 Yes	Safari 完整支持 Yes	WebView Android 完整支持 Yes	Chrome Android 完整支持 Yes	Firefox Android 完整支持 4	Opera Android 完整支持 Yes	Safari iOS 完整支持 Yes	Samsung Internet Android 完整支持 Yes

图例

完整支持

完整支持

另请参阅

• <p>
• <div>
• <section>

元数据

• 最后修改： Nov 6, 2020

相关话题

1. <address>
2. <article>
3. <aside>
4. <footer>
5. <h1>-<h6>
6. <header>
7. <hgroup>
8. <main>
9. <nav>
10. <section>
11. HTML 元素

    1. A
       1. <a>
       2. <abbr>
       3. <acronym>
       4. <address>
       5. <applet>
       6. <area>
       7. <article>
       8. <aside>
       9. <audio>
    2. B
       1. <b>
       2. <base>
       3. <basefont>
       4. <bdi>
       5. <bdo>
       6. <bgsound>
       7. <big>
       8. <blink>
       9. <blockquote>
       10. <body>
       11. <br>
       12. <button>
    3. C
       1. <canvas>
       2. <caption>
       3. <center>
       4. <cite>
       5. <code>
       6. <col>
       7. <colgroup>
       8. <content>
    4. D
       1. <data>
       2. <datalist>
       3. <dd>
       4. <del>
       5. <details>
       6. <dfn>
       7. <dialog>
       8. <dir>
       9. <div>
       10. <dl>
       11. <dt>
    5. E
       1. <em>
       2. <embed>
    6. F
       1. <fieldset>
       2. <figcaption>
       3. <figure>
       4. <font>
       5. <footer>
       6. <form>
       7. <frame>
       8. <frameset>
    7. G H
       1. <h1>
       2. <h2>
       3. <h3>
       4. <h4>
       5. <h5>
       6. <h6>
       7. <head>
       8. <header>
       9. <hgroup>
       10. <hr>
       11. <html>
    8. I
       1. <i>
       2. <iframe>
       3. <img>
       4. <input>
       5. <ins>
       6. <isindex>
    9. J K
       1. <kbd>
       2. <keygen>
    10. L
        1. <label>
        2. <legend>
        3. <li>
        4. <link>
        5. <listing>
    11. M
        1. <main>
        2. <map>
        3. <mark>
        4. <marquee>
        5. <menu>
        6. <menuitem>
        7. <meta>
        8. <meter>
    12. N
        1. <nav>
        2. <nobr>
        3. <noframes>
        4. <noscript>
    13. O
        1. <object>
        2. <ol>
        3. <optgroup>
        4. <option>
        5. <output>
    14. P
        1. <p>
        2. <param>
        3. <picture>
        4. <plaintext>
        5. <pre>
        6. <progress>
    15. Q
        1. <q>
    16. R
        1. <rp>
        2. <rt>
        3. <rtc>
        4. <ruby>
    17. S
        1. <s>
        2. <samp>
        3. <script>
        4. <section>
        5. <select>
        6. <shadow>
        7. <slot>
        8. <small>
        9. <source>
        10. <spacer>
        11. <span>
        12. <strike>
        13. <strong>
        14. <style>
        15. <sub>
        16. <summary>
        17. <sup>
    18. T
        1. <table>
        2. <tbody>
        3. <td>
        4. <template>
        5. <textarea>
        6. <tfoot>
        7. <th>
        8. <thead>
        9. <time>
        10. <title>
        11. <tr>
        12. <track>
        13. <tt>
    19. U
        1. <u>
        2. <ul>
    20. V
        1. <var>
        2. <video>
    21. W
        1. <wbr>
    22. X Y Z
        1. <xmp>