functional state update
Compute the next state from the previous state supplied by the framework.
Use this when Rapid updates lose increments or append to an old list.
without the term
“If I click the like button really fast, the count only goes up by one or two instead of every click. Some clicks get lost. Can you fix the counter?”
with the term · How do you ask a model for functional state update?
Use functional state updates for this increment. Verify that three queued increments increase the value by three.
What is functional state update?
React setter functions can receive an updater that operates on pending state rather than a captured render value.
Why does functional state update matter when vibe coding?
A callback can retain an older state value and overwrite intervening changes.
How do you do functional state update?
Use an updater when the next value depends on the previous one. Check several queued updates.
What goes wrong with functional state update?
The updater performs a side effect or mutates the previous object.