js屏幕滚动防抖和节流

// 函数防抖
    function debounce(fn, wait) {
        var timeout = null;
        return function() {
            if (timeout !== null)
                clearTimeout(timeout);
            timeout = setTimeout(fn, wait);
        }
    }

// 函数节流
    var throttle = function(func, delay) {
        var prev = Date.now();
        return function() {
            var context = this;
            var args = arguments;
            var now = Date.now();
            if (now - prev >= delay) {
                func.apply(context, args);
                prev = Date.now();
            }
        }
    }

调用:

// 滚动事件
            window.addEventListener('scroll', throttle(handle, 100));

// 滚动事件
                window.addEventListener('scroll', debounce(handle, 100));

// 处理函数
    function handle() {
         //相关操作
    }