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+[Back to 2 Operable index](index.md)
+
+# 2.5.2 Pointer Cancellation
+
+- Level: A
+- Guideline: 2.5 Input Modalities
+- Principle: 2 Operable
+
+## What it is
+
+For functionality that can be operated using a single pointer, at least one of the following is true:
+
+- **No Down-Event:** The down-event of the pointer is not used to execute any part of the function;
+- **Abort or Undo:** Completion of the function is on the up-event, and a mechanism is available to abort the function before completion or to undo the function after completion;
+- **Up Reversal:** The up-event reverses any outcome of the preceding down-event;
+- **Essential:** Completing the function on the down-event is essential.
+
+## How to test
+
+- Check: The down-event of the pointer is not used to execute any part of the function;
+- Check: Completion of the function is on the up-event, and a mechanism is available to abort the function before completion or to undo the function after completion;
+- Check: The up-event reverses any outcome of the preceding down-event;
+- Check: Completing the function on the down-event is essential.
+- Use the sufficient techniques below as acceptable methods when applicable.
+- Confirm none of the common failures apply.
+
+## Sufficient techniques (W3C)
+
+- G210: Ensuring that drag-and-drop actions can be cancelled
+- G212: Using native controls to ensure functionality is triggered on the up-event.
+- Touch events are only triggered when touch is removed from a control (Potential future technique)
+
+## Common failures (W3C)
+
+- F101: Failure of Success Criterion 2.5.2 due to activating a control on the down-event
+
+## Notes
+
+- Note 1: Functions that emulate a keyboard or numeric keypad key press are considered essential.
+- Note 2: This requirement applies to web content that interprets pointer actions (i.e., this does not apply to actions that are required to operate the user agent or assistive technology).
+
+## Resources
+
+- WCAG 2.2 SC: https://www.w3.org/TR/WCAG22/#pointer-cancellation
+- Understanding: https://www.w3.org/WAI/WCAG22/Understanding/pointer-cancellation.html
+- Quick reference: https://www.w3.org/WAI/WCAG22/quickref/?versions=2.2#pointer-cancellation
+
+[Back to 2 Operable index](index.md)