<h1> defines header text.
Supported In HTML4: Yes
Supported In HTML5: Yes
HTML4 vs HTML5 Differences: The "align" attribute was deprecated in HTML 4.01, and is not supported in HTML 5. Use CSS to align elements.
Attributes
Standard Attributes
All standard attributes are supported.
Event Attributes
All event attributes are supported.
HTML5 Tags
- a
- abbr
- acronym
- address
- applet
- area
- article
- aside
- audio
- b
- base
- basefont
- bdo
- big
- blockquote
- body
- br
- button
- canvas
- caption
- center
- cite
- code
- col
- colgroup
- command
- datalist
- dd
- del
- details
- dfn
- dir
- div