函数防抖与节流

1. debounce.js

function debounce(fn, time) {
    let timer;
    return function() {
        clearTimeout(timer);
        timer = setTimeout(() => {
            fn();
        }, time)
    }
}

2. throttle.js

function throttle(fn, timer) {
    let time;
    return function() {
        if (time) return;

        time = setTimeout(() => {
            fn()
            time = null;
        }, timer)
    }
}