KITFORMA · EDITORIAL GUIDE
Why does filtering React props in an Effect show a stale frame?
KitForma editorial guide. Derived data stored in separate state needs an extra render to catch up.
Step-by-step guidance
Derived data stored in separate state needs an extra render to catch up. Calculate
const visible = rows.filter(matches) during rendering. Add useMemo only if measurement shows the calculation is expensive and its dependencies are stable. Keep source rows and filter criteria as the actual state. Verify changing the filter never displays the previous filter’s list; do not duplicate values that can be calculated from existing inputs.Sources and verification
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