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Element: ariaColCount property

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".

<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>
let el = document.getElementById("semantic-table");
console.log(el.ariaColCount); // 2
el.ariaColCount = "3";
console.log(el.ariaColCount); // 3

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
ariaColCount 81 81 No No 68 12.1 81 81 No 58 12.2 13.0

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https://developer.mozilla.org/en-US/docs/Web/API/Element/ariaColCount