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Pointer Cancellation (2.5.2)

For single-pointer actions, at least one of the following must be true: the down-event does not trigger the action, the action is triggered on the up-event and can be aborted, the up-event reverses any outcome of the down-event, or completing the action on the down-event is essential.

WCAG Reference

Applies to: WCAG 2.1, WCAG 2.2 Introduced in: WCAG 2.1 | Level: A | Read the official specification →

What this rule checks​

The scanner verifies that interactive elements do not fire irreversible actions on mousedown or touchstart alone, allowing users to abort by moving the pointer away before releasing.

Why it matters​

Users with motor impairments frequently trigger accidental clicks. Firing on the up-event (click/mouseup/touchend) allows them to move the pointer off the target before releasing, cancelling the action.

Common failure patterns​

  • destructive actions (delete, submit, purchase) triggered on mousedown
  • drag-and-drop that commits on pointerdown with no undo
  • custom buttons that respond to touchstart instead of click

Remediation guidance​

  • use click events rather than mousedown or touchstart for actions
  • if down-event activation is needed, provide an undo or confirmation step
  • implement drag cancellation by allowing users to drop outside the target zone
  • test by pressing down on a button, dragging away, and releasing to confirm no action occurs
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