ScriptdrillDebounce
A JavaScript exercise from Scriptdrill. Solve it with a code editor in your browser that runs your function against example and hidden tests, and it is checked the moment you submit.
The task
Return a debounced version of `fn`: calling it schedules `fn` to run `wait` ms later with the latest arguments, and every new call before then restarts the wait. So a burst of calls runs `fn` once, after the burst goes quiet. Tests run on a fake clock: `setTimeout`, `clearTimeout` and `Date.now` are simulated, so waits are instant and exact.
What this exercise teaches
Clearing the pending timer on every call is what restarts the wait; only the timer from the last call survives long enough to fire, and it carries that call's arguments.
A hint if you get stuck
Keep the timer id in a variable outside the returned function. On every call, `clearTimeout` the old timer and set a new one that calls `fn(...args)`.
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