aria-colspan

Integer

Indicates how many columns a cell spans in a grid or treegrid, mirroring the native `colspan` attribute for ARIA-based tables. It helps assistive technologies convey the cell's extent across columns. You only need it on custom grids built without native table elements, which already expose spanning.

aria-colspan="…"

Value

Any integer.

Used on

Associated roles

cell columnheader gridcell rowheader

Example

aria-colspan="…"

<div role="gridcell" aria-colspan="2">Merged</div>

References

WAI-ARIA 1.2 specification
MDN Web Docs