How many times does debounce execute for 5 rapid calls?
Once. Only the last call executes, after the delay. All intermediate calls cancel and reset the timer. The function runs 300ms (or whatever the delay is) after the last call.
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More FAQs in Debounce vs Throttle: Visual Explanation
Multiple, at a fixed rate. For 5 calls over 800ms with a 300ms interval: executes at 0ms, 400ms, 800ms (3 times). Calls between executions are ignored.
Debounce: one execution at the end (after activity stops). Throttle: multiple executions spread out at a fixed rate. Debounce waits; throttle rate-limits.
Yes. Each new call clears the previous timer (clearTimeout). Only the last call's timer fires. This is why only one execution happens - all previous timers are cancelled.
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