UA Ledger · Playable Test Bench · draft for review
Teaching laboratory. Cases run in this page against the authored functions. This is not a device panel, network approval, analytics-delivery proof or campaign result. Inputs are synthetic.
Removing a celebration animation should not remove the event that unlocks the next action. This fixture checks that motion preference changes presentation without trapping the player in an unfinished state.
Primary documentation: MDN: reduced motion (body read 2026-09-19).
| Case | Input | Expected | Fixed | Broken |
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A pass proves the supplied state transition completes in both modes. It does not constitute an accessibility audit or show that the actual visual treatment is comfortable. The alternative presentation still needs to communicate the reward clearly and leave keyboard, pointer and screen-reader access coherent.