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How can I debounce a function to limit its execution rate in JavaScript?

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How can I debounce a function to limit its execution rate in JavaScript?

Asked on Jan 28, 2026

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Debouncing is a technique used to limit the rate at which a function is executed by delaying its execution until after a specified wait time has elapsed since the last time it was invoked.

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

        // Example usage:
        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 in milliseconds ("wait").
It returns a new function that, when invoked, clears the previous timeout and sets a new one.
The "handleResize" function will only execute 300 milliseconds after the last "resize" event.
This technique is useful for performance optimization, especially with events like "resize" or "scroll".

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How can I debounce a function to limit its execution rate in JavaScript?

Asked on Jan 28, 2026

Answer

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