Attaching heavy DOM manipulation to scroll or resize causes lag. Debouncing limits execution until after a pause in events; throttling limits execution to once per time window.
jQuery Debounce and Throttle Events
Control rate of execution for high-frequency resize and scroll events.
Key Takeaways: jQuery Debounce and Throttle Events
Mastering jQuery Debounce and Throttle Events helps you write clean and reliable jQuery code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
jQuery Debounce and Throttle Events Code Example
jQueryfunction debounce(fn, delay) {
let timer;
return function() {
clearTimeout(timer);
timer = setTimeout(() => fn.apply(this, arguments), delay);
};
}
$(window).on("resize", debounce(function() {
console.log("Window resize finished:", $(window).width());
}, 250));Output
Executes resize handler once after user stops resizing
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