JS逆向 -- HOOK关键数据

// ==UserScript==
// @name         hooktest
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://*/*
// @icon         https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg.ixinwei.com%2Fiww202109%2F20214738.jpg&refer=http%3A%2F%2Fimg.ixinwei.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1650683129&t=29117ba3af5ba0a8a6b0e343200c9489
// @grant        none
// ==/UserScript==
(function() {
    var cookieTemp = "";
    Object.defineProperty(document, 'cookie', {
        set: function(val) {
                console.log('cookie值->', val);
                cookieTemp = val;
                return val;
        },
        get: function()
{
            return cookieTemp;
        }
    });
})();

if (val.indexOf("BIDUPSID") != -1) {
debugger ;//如果cookie里存在这个值就断下来
}