Pointer Cancellation

Success criterion 2.5.2 · Level A

Pointer Cancellation

Actions fire on the up-event, and can be aborted or undone, so accidental touches can be cancelled.

Principle 2: Operable · Guideline 2.5: Input Modalities

What each role can do

Product manager

Require that destructive actions can be cancelled or undone.

Designer

Design so that sliding off a control cancels it; offer undo for important actions.

Developer

Trigger actions on click or pointer-up, never on pointer-down, unless essential.

Tester

Press a control, slide away, release; confirm nothing fires.

Once it is fixed

“I slid my finger away and nothing happened. That's the best nothing ever!”