// 防抖
let timeoutKey;
function antiShake (cb) {
    window.clearTimeout(timeoutKey);
    timeoutKey = setTimeout(cb, 500);
}

function getDebounceFunc (cb, interval) {
    let timer;
    return () => {
        clearTimeout(timer);
        timer = setTimeout(cb, interval)
    }
}

// 节流
function throttle(fn, gapTime) {
  let _lastTime = null;

  return function () {
    let _nowTime = + new Date()
    if (_nowTime - _lastTime > gapTime || !_lastTime) {
      fn();
      _lastTime = _nowTime
    }
  }
}