try to do the world!
// ==UserScript==
// @name New5 Userscript
// @namespace http://tampermonkey.net/
// @license MIT
// @version 0.1
// @description try to do the world!
// @author You
// @match https://huodong.xueanquan.com/2022safeedu/guanwei.html?tabNum=2
// @icon https://www.google.com/s2/favicons?sz=64&domain=xueanquan.com
// @grant none
// ==/UserScript==
(function() {
'use strict';
var elment1=document.querySelector("body > div.container-fluid > div:nth-child(1)");
var para = document.createElement("a");
para.href="javascript:window.opener=null;window.open('','_self');window.close();";
para.innerText="s关闭s";
para.setAttribute("Id","closeself");
elment1.parentElement.insertBefore(para,elment1);
document.getElementById("closeself").click();
// Your code here...
})();