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Motion · 24 UseAnimate Cleanup
Series contents · Technology map
Stage: Validating a Motion System · Editable example · Storage ID: motion-step-24
Goals and learning outcomes
- Learning outcome: Explain the role of Scope. Input case: Running and removing midway.
- Deliverable: Completion logs and a record of work after removal. Connect your rationale for handling Asynchronous order to the code.
Prerequisites
Prepare the results of the InView and Once exercises from Unit 23, “In-View Animation”.
Key concepts and explanations
Scope
useAnimate controls elements inside its scope. Ownership is clearer than with global selectors.
Asynchronous order
Use await to sequence motion. Also check whether subsequent work remains valid after unmount.
Practice setup
First check the execution scope guidance on the example screen. The following describes the environment needed to extend the assignment in a separate project. The existing motion-01·02·03 examples are limited examples based on Motion JS animate. For React layout, AnimatePresence, and hooks exercises, install motion in a separate local React project and import from motion/react. Do not assume JSX runs directly in the editor; preserve CSP and isolation.
The linked example is a starting point. It does not implement every task below. Complete work beyond its supported scope in a separate project.
Practice tasks
- In src/day-24.tsx of a separate exercise project, use useAnimate to sequence a heading followed by cards, and unmount midway. Use the existing Unit 1·14·28 examples only as starting points.
- Input condition: Running and removing midway. Baseline: After completion. Run under the baseline condition, then record observations and errors in notes/day-24.md.
- Variable to change: Removal time; new value: During the first action. Run again with the same input path. Deliverable to save: Completion logs and a record of work after removal. Hypothesis to test: No UI updates remain after removal. Compare it with the actual results and record whether they agree and the causes of any differences.
Variables to observe
| Variable | Baseline | Change | Expected change / hypothesis |
|---|---|---|---|
| Removal time | After completion | During the first action | No UI updates remain after removal. |
Predictions in this table are not measured results. Change one condition at a time and record why the actual result differs.
Completion criteria
- Required deliverable: Completion logs and a record of work after removal. You have results for both the baseline and changed conditions, allowing a comparison of 2 conditions, and have recorded the input values and execution environment.
- Your explanation of the differences between the two conditions connects both concepts: Scope and Asynchronous order. For unexpected items, give at least 1 cause or reason they remain unresolved.
Self-check
- Which processing stage does Scope affect in this exercise? Input case: Running and removing midway.
- Variable to change: Removal time. Hypothesis to test: No UI updates remain after removal. Did the actual results agree with the hypothesis? Explain your evidence in terms of Asynchronous order.
Official references
Linked example and execution scope
Example source · Runtime environments and limits
Interactive UseAnimate Cleanup experiment with cleanup of the resources used.
Source code and records are not overwritten automatically. Resetting an existing example also preserves your notes.