| Content categories | Flow content, heading content, palpable content. |
|---|---|
| Permitted content | Phrasing content. |
| Tag omission | None, both the starting and ending tag are mandatory. |
| Permitted parents | Any element that accepts flow content; don't use as a child of <hgroup> element, it is now deprecated |
| Permitted ARIA roles | tab, presentation |
| DOM interface | HTMLHeadingElement |
These elements include the global attributes.
The align attribute is obsolete; don't use it.
font-size property instead.<h1>, next use <h2> and so on.<section> element, you should consider avoiding using <h1> more than once on a page; by convention and for accessibility, it's used for the page's displayed title, with all headings below starting with <h2>. When using sections, you should use one <h1> per section. See "Defining sections" in Using HTML sections and outlines for more information.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:
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:
| Specification | Status | Comment |
|---|---|---|
| WHATWG HTML Living Standard The definition of '<h1>, <h2>, <h3>, <h4>, <h5>, and <h6>' in that specification. | Living Standard | |
| HTML5 The definition of '<h1>, <h2>, <h3>, <h4>, <h5>, and <h6>' in that specification. | Recommendation | |
| HTML 4.01 Specification The definition of '<h1>, <h2>, <h3>, <h4>, <h5>, and <h6>' in that specification. | Recommendation |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 1.0 (1.7 or earlier) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 1.0 (1.0) | (Yes) | (Yes) | (Yes) |
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Heading_Elements