HTML: The Markup Language (an HTML language reference)

h3heading # T

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

Permitted contents #

Permitted attributes #

global attributes
Any attributes permitted globally.

Additional constraints and admonitions #

Tag omission #

An h3 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 #

h3 {
display: block;
font-size: 1.17em;
margin-before: 1em;
margin-after: 1em;
margin-start: 0;
margin-end: 0;
font-weight: bold; }