Struct Col 

pub struct Col;

The <col> element - defines a column within a table.

Purpose

The <col> element defines a column or a group of columns within a table. Used inside <colgroup> to apply attributes and styles to entire columns without affecting individual cells. Provides a way to style columns collectively.

Content Categories

• None (only valid within <colgroup>)

Permitted Content Model

• None (void element)

Common Use Cases

• Setting column widths
• Applying styles to specific columns
• Defining visibility for individual columns
• Grouping columns with shared formatting
• Creating alternating column styles

Key Attributes

• span: Number of consecutive columns this element represents (default: 1)

Example

<!-- Individual column styling -->
<table>
  <colgroup>
    <col class="name-column">
    <col class="data-column">
    <col class="data-column">
  </colgroup>
  <thead>
    <tr>
      <th>Name</th>
      <th>Value 1</th>
      <th>Value 2</th>
    </tr>
  </thead>
</table>

<!-- Using span attribute -->
<table>
  <colgroup>
    <col>
    <col span="2" class="numeric-columns">
    <col>
  </colgroup>
  <thead>
    <tr>
      <th>Product</th>
      <th>Price</th>
      <th>Quantity</th>
      <th>Notes</th>
    </tr>
  </thead>
</table>

<!-- Column widths -->
<table>
  <colgroup>
    <col style="width: 40%;">
    <col style="width: 30%;">
    <col style="width: 30%;">
  </colgroup>
  <thead>
    <tr>
      <th>Description</th>
      <th>Category</th>
      <th>Status</th>
    </tr>
  </thead>
</table>

WHATWG Specification

• 4.9.4 The col element

Trait Implementations

impl HtmlElement for Col

const TAG: &'static str = "col"

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

const VOID: bool = true

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

impl CanContain<Col> for Colgroup