// 防止快速连续点击,节流函数
function throttle(fun, delay) {
  let oadDate = Date.now();
  return function() {
    let _this = this;
    let args = arguments;
    let newDate = Date.now();
    if(newDate-oadDate > delay) {
      fun.apply(_this, args);
      oadDate = Date.now();
    }
  }
}

调用方法：click：throttle（function {// 点击操作}, 1000）, 1000设置时间 1s