@cch137/format-utils/dist/throttle-debounce/index.js

A collection of utility modules for formatting and processing data

export function throttle(func, delay, leading = true) {
    let lastTime = 0;
    let timer = null;
    let lastArgs = null;
    return ((...args) => {
        const now = Date.now();
        const remaining = delay - (now - lastTime);
        lastArgs = args;
        if (remaining <= 0) {
            if (timer) {
                clearTimeout(timer);
                timer = null;
            }
            if (leading || lastTime !== 0) {
                func(...args);
                lastTime = now;
                lastArgs = null;
            }
            else {
                lastTime = now;
            }
        }
        else if (!timer && !leading) {
            timer = setTimeout(() => {
                lastTime = Date.now();
                timer = null;
                if (lastArgs) {
                    func(...lastArgs);
                    lastArgs = null;
                }
            }, remaining);
        }
    });
}
export function debounce(func, delay, maxDelay = delay + 1) {
    let firstTriggedAt = 0;
    let timer = null;
    return ((...args) => {
        const currentTime = Date.now();
        if (firstTriggedAt === 0) {
            firstTriggedAt = currentTime;
        }
        if (timer) {
            clearTimeout(timer);
        }
        const timeElapsed = currentTime - firstTriggedAt;
        if (timeElapsed >= maxDelay) {
            firstTriggedAt = 0;
            func(...args);
        }
        else {
            timer = setTimeout(() => {
                firstTriggedAt = 0;
                timer = null;
                func(...args);
            }, delay);
        }
    });
}