Properties

WAI-ARIA: aria-colcount (Property)

Authored By :Raghavendra Satish Peri Last Updated :April 20, 2023 Properties

Description

Defines the total number of columns in a table, grid, or treegrid. See related aria-colindex.

If all of the columns are present in the DOM, it is not necessary to set this attribute as the user agent can automatically calculate the total number of columns. However, if only a portion of the columns is present in the DOM at a given moment, this attribute is needed to provide an explicit indication of the number of columns in the full table.

Authors MUST set the value of aria-colcount to an integer equal to the number of columns in the full table. If the total number of columns is unknown, authors MUST set the value of aria-colcount to -1 to indicate that the value should not be calculated by the user agent.

Browser Compatibility For aria-colcount

	desktop						mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet
`ariaColCount`	ChromeFull support81	EdgeFull support81	FirefoxNo supportNo	Internet ExplorerNo supportNo	OperaFull support68	SafariFull support12.1	WebView AndroidFull support81	Chrome AndroidFull support81	Firefox for AndroidNo supportNo	Opera AndroidFull support58	Safari on iOSFull support12.2	Samsung InternetFull support13.0

Screen Reader support For aria-colcount

Expectation	JAWS			Narrator	NVDA			Orca	TalkBack	VoiceOver (iOS)	VoiceOver (macOS)
Expectation	Chrome	Edge	Firefox	Edge	Chrome	Edge	Firefox	Firefox	Chrome	Safari	Safari
MUST convey the total column count when some columns are hidden	supported	supported	supported	supported	supported	supported	supported	unknown	none	none	none
MUST NOT convey a column count when total column count is unknown	none	none	none	none	none	none	none	unknown	none	none	none

aria-colcount Example

The following example shows a grid with 16 columns, of which columns 2, 3, 4, and 9 are displayed to the user.

<div role="grid" aria-colcount="16">
  <div role="rowgroup">
    <div role="row">
      <span role="columnheader" aria-colindex="2">First Name</span> <span role="columnheader" aria-colindex="3">Last Name</span> <span role="columnheader" aria-colindex="4">Company</span> <span role="columnheader" aria-colindex="9">Phone</span>
    </div>
  </div>
  <div role="rowgroup">
    <div role="row">
      <span role="gridcell" aria-colindex="2">Fred</span> <span role="gridcell" aria-colindex="3">Jackson</span> <span role="gridcell" aria-colindex="4">Acme, Inc.</span> <span role="gridcell" aria-colindex="9">555-1234</span>
    </div>
    <div role="row">
      <span role="gridcell" aria-colindex="2">Sara</span> <span role="gridcell" aria-colindex="3">James</span> <span role="gridcell" aria-colindex="4">Acme, Inc.</span> <span role="gridcell" aria-colindex="9">555-1235</span>
    </div>…
  </div>
</div>

Characteristics

Used in Roles

table

Inherits into Roles

Value

integer
- A numerical value without a fractional component.

Semantic HTML

No HTML element equivalent.

Reference

W3C (opens new window)
A11Y Support
MDN Web Docs

Related Insights on Accessibility

Raghavendra Satish Peri

Raghavendra Satish Peri is a digital Transformation specialist working with small & large enterprises in the areas of digital accessibility & digital marketing. He authors an Accessibility Blog at DigitalA11Y.com & is galvanizing the adoption of accessibility by inspiring the local tech community with meetups and mentorship. He propelled this thought by founding HelloA11y.com, a community of accessibility professionals, developers, and enthusiasts. When away from his computer, Raghava can be found at local cafes & restaurants sampling cuisines, attending local meetups, listening to audio books, or writing on his Personal Blog at raghava.in.

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