领取天猫优惠券 js

(function(window, document, undefined) { 
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 - document.documentElement.clientHeight; 
var autoScrollDown = setInterval(function() { 
_scrollTop += _scrollStep; 
if (_scrollTop > _maxScrollTop) { 
clearInterval(autoScrollDown); 
couponLinks = document.querySelectorAll('.j_ReceiveCoupon'); 
console.log("总共：" + couponLinks.length + "条张优惠券待领取..."); 
getCoupon(); 
} else { 
document.body.scrollTop = _scrollTop; 
} 
}, 500); 
}) (window, document); 

来自 <https://www.v2ex.com/t/228164?p=1>