Struct Thead 

pub struct Thead;

The <thead> element - groups header rows in a table.

Purpose

The <thead> element groups one or more <tr> elements that contain table headers. It defines the header section of a table, typically containing column labels. Browsers can use this to enable scrolling of the table body independently of the header, and to repeat headers when printing multi-page tables.

Content Categories

• None (only valid within <table>)

Permitted Content Model

• Zero or more <tr> elements

Common Use Cases

• Defining column headers for tables
• Creating sticky headers that remain visible while scrolling
• Enabling header repetition in printed tables
• Semantically separating headers from data
• Styling table headers distinctly from data

Key Attributes

• Global attributes only

Example

<!-- Basic table header -->
<table>
  <thead>
    <tr>
      <th>Name</th>
      <th>Email</th>
      <th>Role</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>John Doe</td>
      <td>john@example.com</td>
      <td>Developer</td>
    </tr>
  </tbody>
</table>

<!-- Multi-row header -->
<table>
  <thead>
    <tr>
      <th rowspan="2">Name</th>
      <th colspan="2">Contact</th>
    </tr>
    <tr>
      <th>Email</th>
      <th>Phone</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Alice</td>
      <td>alice@example.com</td>
      <td>555-0001</td>
    </tr>
  </tbody>
</table>

<!-- Sticky header -->
<table>
  <thead style="position: sticky; top: 0; background: white;">
    <tr>
      <th>Product</th>
      <th>Price</th>
      <th>Stock</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Widget</td>
      <td>$10</td>
      <td>50</td>
    </tr>
    <!-- Many more rows... -->
  </tbody>
</table>

Accessibility

• Use <th> elements within <thead> for proper header semantics
• Add scope attributes to header cells for complex tables
• Ensure header text is descriptive and concise

WHATWG Specification

• 4.9.6 The thead element

Trait Implementations

impl HtmlElement for Thead

const TAG: &'static str = "thead"

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<Script> for Thead

impl CanContain<Template> for Thead

impl CanContain<Thead> for Table

impl CanContain<Tr> for Thead