arrow_backBACK TO DRILLS
Blue Beltstate-snapshots

Three Functional Updater Calls in One Handler

A counter starts at 0. Inside one click handler, React runs:

REACT_MODULE // 0x42
setNumber(n => n + 1);
setNumber(n => n + 1);
setNumber(n => n + 1);

What will the counter display after the next render?

BugDojo
BlogFAQ

© 2026. Carved in code.