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How can I debounce a function to limit how often it runs?

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How can I debounce a function to limit how often it runs?

Asked on Jan 21, 2026

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Debouncing is a technique to limit how often a function is executed by delaying its execution until after a specified wait time has elapsed since the last time it was invoked. This is useful for optimizing performance in scenarios like window resizing or input events.

<!-- BEGIN COPY / PASTE -->
        function debounce(func, wait) {
            let timeout;
            return function(...args) {
                const context = this;
                clearTimeout(timeout);
                timeout = setTimeout(() => func.apply(context, args), wait);
            };
        }

        const handleResize = debounce(() => {
            console.log('Window resized');
        }, 300);

        window.addEventListener('resize', handleResize);
        <!-- END COPY / PASTE -->

Additional Comment:

The "debounce" function takes two arguments: the function to debounce ("func") and the delay time in milliseconds ("wait").
It returns a new function that, when invoked, clears any existing timeout and sets a new one.
The "handleResize" function is a debounced version of a function that logs "Window resized" to the console.
The "resize" event listener on the window uses the debounced "handleResize" function to limit how often the resize logic runs.

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How can I debounce a function to limit how often it runs?

Asked on Jan 21, 2026

Answer

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