HTML5: h1 – heading

HTML: The Markup Language

h1 – heading ⓘ # T

The h1 through h6 elements are headings for the sections with which they are associated.

Permitted content #

phrasing content

Permitted attributes #

common attributes

Additional constraints and admonitions #

The h1 element must not appear as a descendant of the address element.
The align attribute on the h1 element is obsolete. Use CSS instead.

Tag omission #

An h1 element must have both a start tag and an end tag.

Permitted parent elements #

any element that can contain flow elements, hgroup

DOM interface #

interface HTMLHeadingElement : HTMLElement {};

Typical default display properties #

h1 {

display: block;

font-size: 2em;

margin: .67em 0 .67em 0;

font-weight: bold; }