23 lines
1.0 KiB
Plaintext
23 lines
1.0 KiB
Plaintext
Heading elements implement six levels of document headings, <h1> is the most important and <h6> is the least. A heading element briefly describes the topic of the section it introduces. Heading information may be used by user agents, for example, to construct a table of contents for a document automatically.
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Content categories:
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Flow content, heading content, palpable content.
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Permitted content:
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Phrasing content.
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Tag omission:
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None, both the starting and ending tag are mandatory.
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Permitted parent elements:
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Any element that accepts flow content; or as a child of an <hgroup> element.
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DOM interface:
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HTMLHeadingElement
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Notes:
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Do not use lower levels to decrease heading font size: use the CSS font-size property instead.
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Avoid skipping heading levels: always start from <h1>, next use <h2> and so on. Also try to have only one first level heading on a page.
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In HTML5, use the <section> element to define the outline of a document. Headings provide titles for sections and subsections. You can also group a heading and its content using the <div> element. |