// ==UserScript==
// @name         淘宝天猫优惠券佣金查询
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://item.taobao.com/item*
// @match        https://detail.tmall.com/item*
// @grant        GM_xmlhttpRequest
// @run-at       document-idle
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_setClipboard
// @grant        unsafeWindow
// @grant        window.close
// @grant        window.focus
// @require      https://cdn.bootcss.com/jquery/2.2.4/jquery.js
// @grant        GM_xmlhttpRequest
// ==/UserScript==


(function() {
    'use strict';
      setTimeout(function () {
           var taobaoGoodUrl = window.location.href;
          var finalUrl = "";
          if(taobaoGoodUrl.indexOf("taobao")>0){
               finalUrl = taobaoGoodUrl.replace('https://item.taobao.com/item.htm?', 'https://item.taobao.com/item.htm?abc=1&')
          }
          if(taobaoGoodUrl.indexOf("tmall")>0){
                finalUrl = taobaoGoodUrl.replace('https://detail.tmall.com/item.htm?', 'https://item.taobao.com/item.htm?abc=1&')
          }
          console.log("==============>");
          console.log(finalUrl);
          console.log("==============>");
          var taobao_good_id = getQueryString(finalUrl,"id");
          getHighRate(taobao_good_id);
    }, 2000)//隔2秒之后执行.应该就能解决这个问题了
    // Your code here...
})();

/**
 * 单个商品获取优惠券高佣数据
 * @param taobao_good_id
 */
function getHighRate(taobao_good_id) {
    var taobaourl = "https://shaobingquan.com/taobao/getCouponByMoneky?pid=mm_13873584_23600399_359990876&taobao_good_id="+taobao_good_id;
    GM_xmlhttpRequest({
        method: 'GET',
        url: taobaourl,
        onload: function(msg){
            var json = msg.responseText;
            console.log(json);
            var a = eval('(' + json + ')');
            var fangQiangFavor = a.result.body;
            var resultCode = a.result.resultCode;
            var resultMsg = a.result.resultMsg;
            var html = new Array();
                html.push('<div  style="color:#000;background:#FFF2E8;font-size:20px;">');
                html.push('<a style="color:#1056f9;    font-weight: bold;height: 36px;line-height: 41px;min-width: 100px;display: inline-block;" href=" ');
                html.push(fangQiangFavor.lovepop_coupon_url);
                html.push('">');
                html.push('点我领券(无券也能拿返佣)</a> </br>');
                html.push('<span name="');
                html.push('fangyong');
                html.push('"');
                html.push('>返佣比例：');
                html.push(fangQiangFavor.mission_price);
                html.push('%</span>');
                html.push('==>约');
                console.log("fangQiangFavor.mission_price======>"+fangQiangFavor.mission_price);
                console.log("fangQiangFavor.zk_final_price======>"+fangQiangFavor.zk_final_price);
                var final_price = Number((fangQiangFavor.mission_price*fangQiangFavor.zk_final_price/100));
                html.push(final_price);
                html.push('元</br> <span name="');
                html.push('coupon');
                html.push('"');
                html.push('>优惠券金额：');
                html.push(fangQiangFavor.coupon_price);
                html.push('</span>');
                html.push('</div>');
                $('#J_isku').append(html.join(''));
                $('.tb-sku').append(html.join(''));
        }
    });

}

function getQueryString(url, name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
    var r = url.substr(1).match(reg);
    if (r != null) return unescape(r[2]);
    return null;
}

脚本部署步骤：

1、先在chrome中安装tampermonkey

2、在tampermonkey里新建一个用户脚本

3、将上面的代码复制进去保存

4、打开任意淘宝商品，进入详情页，等待2秒，如果没有，那就再打开一个商品试试

如图，说明你成功了。