What is the immediate flag in debounce?
When true, the function executes on the first call (not waiting for the delay). Subsequent calls within the delay are debounced. Useful for buttons that should respond immediately but prevent double-clicks.
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More FAQs in Debounce Implementation: Step by Step
Use rest parameters: return function(...args) { clearTimeout(timer); timer = setTimeout(() => fn(...args), delay); }. Spread the args into the original function call.
Use apply: timer = setTimeout(() => fn.apply(this, args), delay). this inside the returned function is the caller's this. apply passes it to the original function.
Attach a cancel property to the returned function: debounced.cancel = () => clearTimeout(timer). Call debounced.cancel() to cancel the pending execution.
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