Throttling limits the rate at which a function executes, such as limiting a function call to once every few milliseconds. This is useful for performance-intensive operations like scrolling.
function throttle(func, limit) {
let lastFunc;
let lastRan;
return function (...args) {
if (!lastRan) {
func.apply(this, args);
lastRan = Date.now();
} else {
clearTimeout(lastFunc);
lastFunc = setTimeout(() => {
if ((Date.now() - lastRan) >= limit) {
func.apply(this, args);
lastRan = Date.now();
}
}, limit - (Date.now() - lastRan));
}
};
}