Element: ariaColCount property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since October 2023.
The ariaColCount property of the Element interface reflects the value of the aria-colcount attribute, which defines the number of columns in a table, grid, or treegrid.
Value
A string.
Examples
In this example the aria-colcount attribute on the element with an ID of semantic-table is set to "2". Using ariaColCount we update the value to "3".
html
<table
id="semantic-table"
role="table"
aria-label="Semantic Elements"
aria-describedby="semantic_elements_table_desc"
aria-rowcount="100"
aria-colcount="2">
<caption id="semantic_elements_table_desc">
Semantic Elements to use instead of ARIA's roles
</caption>
<thead role="rowgroup">
<tr role="row">
<th role="columnheader" aria-sort="none" aria-rowindex="1">ARIA Role</th>
<th role="columnheader" aria-sort="none" aria-rowindex="1">
Semantic Element
</th>
</tr>
</thead>
<tbody role="rowgroup">
<tr role="row">
<td role="cell" aria-rowindex="11">header</td>
<td role="cell" aria-rowindex="11">h1</td>
</tr>
<tr role="row">
<td role="cell" aria-rowindex="16">header</td>
<td role="cell" aria-rowindex="16">h6</td>
</tr>
<tr role="row">
<td role="cell" aria-rowindex="18">rowgroup</td>
<td role="cell" aria-rowindex="18">thead</td>
</tr>
<tr role="row">
<td role="cell" aria-rowindex="24">term</td>
<td role="cell" aria-rowindex="24">dt</td>
</tr>
</tbody>
</table>
js
let el = document.getElementById("semantic-table");
console.log(el.ariaColCount); // 2
el.ariaColCount = "3";
console.log(el.ariaColCount); // 3
Specifications
| Specification |
|---|
| Accessible Rich Internet Applications (WAI-ARIA) # dom-ariamixin-ariacolcount |