Implement Debounce

Problem

Write `debounce(fn, ms)` that returns a function which, when called repeatedly, will fire `fn` only once `ms` milliseconds have passed since the last call. This is the pattern behind 'search-as-you-type' that doesn't hammer the server.

Input

N/A (functional programming problem — print arbitrary proof via console.log).

Output

Single line: `fired=<count>` after rapid calls.

Constraints

fn is called 10 times with 50ms gaps; debounce ms=200. Expected: fires exactly once.

Sample input

(calls 10 times at 50ms intervals; final wait 300ms)

Sample output

fired=1

Explanation

Each call resets the timer; fn only runs when 200ms of silence passes.

closurestimersfunctionaldesign@Facebook@Airbnb@Shopify

Visible test cases

in: N/A

out: fired=1

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