The HTML aria-pressed attribute
The aria-pressed attribute turns a button into a toggle, announcing whether it is currently pressed. Values: true, false, or mixed for a partially-pressed state.
Overview
The aria-pressed attribute indicates the pressed state of a toggle button.
It is a widget state: a condition that can change as the user interacts. Because ARIA does nothing on its own, you must update this value in JavaScript every time the underlying state changes; a stale state is worse than none. And wherever a native element already expresses the same thing (a checkbox's checked state, the disabled attribute, a <details>'s open state), use that instead.
Like all ARIA, aria-pressed changes only the accessibility tree (what assistive technology perceives), never the element's behavior or appearance. The first rule of ARIA applies: if a native HTML element or attribute conveys this, use that instead, and only reach for ARIA when nothing native fits.
Syntax
<button aria-pressed="false">Bold</button>Values
| Value |
|---|
| true | false | mixed | undefined |
Example
<button aria-pressed="true">★ Favorited</button>Best practices
- Follow the first rule of ARIA: use a native HTML element or attribute that conveys this where one exists, rather than adding ARIA.
- Update the value in JavaScript whenever the state changes; keep it in sync with reality.
- Use the matching native state where one exists (a checkbox's
checked, thedisabledattribute, a <details>'s open state) instead of the ARIA version. - Set it only on an element whose role actually supports this state.