<main> - HTML: HyperText Markup Language 编辑
The HTML <main> element represents the dominant content of the <body> of a document. The main content area consists of content that is directly related to or expands upon the central topic of a document, or the central functionality of an application.
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.
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.A document mustn't have more than one <main> element that doesn't have the hidden attribute specified.
| Content categories | Flow content, palpable content. |
|---|---|
| Permitted content | Flow content. |
| Tag omission | None; both the starting and ending tags are mandatory. |
| Permitted parents | Where flow content is expected, but only if it is a hierarchically correct main element. |
| Implicit ARIA role | main |
| Permitted ARIA roles | No role permitted |
| DOM interface | HTMLElement |
Attributes
This element only includes the global attributes.
Usage notes
The content of a <main> element should be unique to the document. Content that is repeated across a set of documents or document sections such as sidebars, navigation links, copyright information, site logos, and search forms shouldn't be included unless the search form is the main function of the page.
<main> doesn't contribute to the document's outline; that is, unlike elements such as <body>, headings such as <h2>, and such, <main> doesn't affect the DOM's concept of the structure of the page. It's strictly informative.
Example
<!-- other content -->
<main>
<h1>Apples</h1>
<p>The apple is the pomaceous fruit of the apple tree.</p>
<article>
<h2>Red Delicious</h2>
<p>These bright red apples are the most common found in many
supermarkets.</p>
<p>... </p>
<p>... </p>
</article>
<article>
<h2>Granny Smith</h2>
<p>These juicy, green apples make a great filling for
apple pies.</p>
<p>... </p>
<p>... </p>
</article>
</main>
<!-- other content -->Accessibility concerns
Landmark
The <main> element behaves like a main landmark role. Landmarks can be used by assistive technology to quickly identify and navigate to large sections of the document. Prefer using the <main> element over declaring role="main", unless there are legacy browser support concerns.
Skip navigation
Skip navigation, also known as "skipnav", is a technique that allows an assistive technology user to quickly bypass large sections of repeated content (main navigation, info banners, etc.). This lets the user access the main content of the page faster.
Adding an id attribute to the <main> element lets it be a target of a skip navigation link.
<body>
<a href="#main-content">Skip to main content</a>
<!-- navigation and header content -->
<main id="main-content">
<!-- main page content -->
</main>
</body>
Reader mode
Browser reader mode functionality looks for the presence of the <main> element, as well as heading and content sectioning elements when converting content into a specialized reader view.
Specifications
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of '<main>' in that specification. | Living Standard | |
| HTML 5.1 The definition of '<main>' in that specification. | Recommendation | No change from HTML5. |
| HTML5 The definition of '<main>' in that specification. | Recommendation | Initial definition. |
Browser compatibility
BCD tables only load in the browser
The <main> element is widely supported. For Internet Explorer 11 and lower, it's suggested that an ARIA role of "main" be added to the <main> element to ensure it is accessible (screen readers like JAWS, used in combination with older versions of Internet Explorer, understand the semantic meaning of the <main> element when this role attribute is included).
<main role="main">
...
</main>
See also
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论