<h1> through <h6>
Widely available since 2018-01-29
The <h1> through <h6> HTML elements represent six levels of section headings, in order of decreasing importance.
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Specifications
- HTML (#the-h1,-h2,-h3,-h4,-h5,-and-h6-elements), from HTML Workstream (WHATWG).
Browser support
- Chrome 1 Released on 2008-12-11
- Chrome Android 18 Released on 2012-06-27
- Edge 12 Released on 2015-07-29
- Firefox 1 Released on 2004-11-09
- Firefox for Android 4 Released on 2011-03-29
- Safari 3 Released on 2007-10-26
- Safari on iOS 1 Released on 2007-06-29
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