aria-busy

Boolean

Indicates that an element is being updated and may not yet be in a stable, complete state. Setting it to true tells assistive technologies to hold announcements until you set it back to false, avoiding a flurry of partial updates while content loads. It's useful on live regions and containers during asynchronous loading.

aria-busy="…"

Values

true: The element is being updated; hold announcements until done.
false (default): There are no expected updates.

Used on

Any HTML element — aria-busy is a global property.

Associated roles

Every ARIA role. As a global property, aria-busy is supported on all roles.

Example

aria-busy="…"

<ul aria-busy="true" aria-live="polite">…loading…</ul>

References

WAI-ARIA 1.2 specification
MDN Web Docs