Web Design in a Nutshell, 3rd Edition

Name

h1 through h6

Synopsis

    <hn>...</hn>

Attributes

Core (id, class, style, title), Internationalization, Events

Deprecated attributes

align="center|left|right"

This example defines the element as a first-level heading.

    <h1>Camp Sunny-Side Up</h1>

HTML syntax requires that headings appear in order (for example, an h2 should not precede an h1) for proper document structure. Doing so not only improves accessibility, but aids in search engine optimization (information in higher heading levels is given more weight). Using heading levels consistently throughout a site—using h1 for all article titles, for example—is also recommended.

Browsers generally render headings in bold text in decreasing size, but style rules may be applied to easily change their presentation.