极简代码实现节流Throttle和防抖Debounce

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1function debounce(fn, delay) {
2  let timmer = null;
3  return function () {
4    timmer && clearInterval(timmer);
5    timmer = setTimeout(() => {
6      fn.call(this, arguments);
7    }, delay);
8  };
9}

Copy 
1function throttle(fn, delay) {
2  let startTime = 0;
3  return function () {
4    let currentTime = new Date();
5    if (currentTime - startTime > delay) {
6      fn.call(this, arguments);
7      startTime = currentTime;
8    }
9  };
10}