function throttle(fn, gapTime) {
  if (gapTime == null || gapTime == undefined) {
    gapTime = 1500
  }

  let _lastTime = null

  // 返回新的函数
  return function () {
    let _nowTime = + new Date()
    if (_nowTime - _lastTime > gapTime || !_lastTime) {
      fn.apply(this, arguments)   //将this和参数传给原函数
      _lastTime = _nowTime
    }else{
     wx.showToast({
      title: '您的操作过于频繁，请稍后再试~',
      icon: 'none'
    })
    }
  }
}

module.exports = {
  throttle: throttle
}