javascript intermediate 2026-11-17 结束

Debounce from scratch

Implement debounce(fn, wait) without any library. The returned function:

  • delays calling fn until wait ms have passed since the last call,
  • passes the latest arguments to fn,
  • has a .cancel() method that drops a pending call.

The tests use real timers; run the code and wait a moment for All tests passed.

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