Debounce vs throttle — implement debounce

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**Core concept (TL;DR).** *Debouncing* collapses a burst of rapid calls into a **single** call that runs only **after the activity has paused** for a set delay. Every new call resets the timer — so the function fires once, on the trailing edge, when things go quiet.

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Debounce vs throttle — implement debounce

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