aria-setsize

Integer

Declares the total number of items in a set even when only some are in the DOM, as with lazy-loaded or virtualized lists. Combined with aria-posinset it lets screen readers announce an item's place, like '3 of 100'. A value of -1 indicates the total size is unknown.

aria-setsize="…"

Value

Any integer.

Used on

Associated roles

article listitem menuitem menuitemcheckbox menuitemradio option radio row tab treeitem

Example

aria-setsize="…"

<li role="option" aria-setsize="12" aria-posinset="3">…</li>

References

WAI-ARIA 1.2 specification
MDN Web Docs