throttle.js --> 寫在utils文件夾中

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

  let _lastTime = null

  // 返回新的函數
  return function () {
      let _nowTime = + new Date()
      if (_nowTime - _lastTime > gapTime || !_lastTime) {
          fn.apply(this, arguments)   //將this和參數傳給原函數
          _lastTime = _nowTime
      }
  }
}

module.exports = {
  throttle: throttle
}


頁面中引用

var throttle = require(../../utils/throttle)

// 點擊事件
collect: throttle.throttle(function(){})