双11，自动领取优惠券 js 代码

 (function(window, document) {

     var interval = 800;

     var closeDelay = 200;

     var index = 0;

     var couponLinks;

     var getCoupon = function() {

         if (index >= couponLinks.length) {

             console.log("领取完毕");

             return;

         }

         var coponLink = couponLinks[index];

         coponLink.click();

         index++;

         console.log("领取 第" + index + " 张");

         setTimeout(getCoupon, interval);

         setTimeout(function() {

             var close = document.querySelector('.mui-dialog-close');

             if (close != null) close.click();

         }, closeDelay);

     }

     var _scrollTop = 0;

     var _scrollStep = document.documentElement.clientHeight;

     var _maxScrollTop = document.body.clientHeight - _scrollStep;

     var autoScrollDown = setInterval(function() {

         _scrollTop += _scrollStep;

         if (_scrollTop <= _maxScrollTop) {

             document.body.scrollTop = _scrollTop;

             return;

         }

         clearInterval(autoScrollDown);

         couponLinks = document.querySelectorAll('.mui-act-item-yhqbtn');

         console.log("总共：" + couponLinks.length + "条张优惠券待领取…");

         getCoupon();

     }, 500);

 }) (window, document);