Struct H1 

pub struct H1;

The <h1> element - level 1 heading.

Purpose

The <h1> element represents the highest level (most important) heading in a document. It typically represents the main title or subject of the page or section. There should generally be only one <h1> per page for SEO and accessibility best practices.

Content Categories

• Flow Content
• Heading Content
• Palpable Content

Permitted Content Model

• Phrasing content

Common Use Cases

• Main page title
• Primary heading for the document
• Top-level section heading

Key Attributes

• Global attributes only

Example

<article>
  <h1>Introduction to Web Accessibility</h1>
  <p>Web accessibility ensures that websites...</p>
</article>

Accessibility

• Screen readers use headings for navigation
• Should have only one <h1> per page
• Creates the document outline structure

WHATWG Specification

• 4.3.6 The h1-h6 elements

Trait Implementations

impl HtmlElement for H1

const TAG: &'static str = "h1"

The HTML tag name (e.g., “div”, “span”, “img”).

const VOID: bool = false

Whether this is a void element (self-closing, no children allowed).

impl CanContain<H1> for Hgroup

impl<T: PhrasingContent> CanContain<T> for H1

impl CanContain<Text> for H1

impl FlowContent for H1

impl HeadingContent for H1

impl PalpableContent for H1