浏览器控制台引入css和js

var import_css = document.createElement("link");
import_css.setAttribute("rel","stylesheet");
import_css.setAttribute("href", "https://cdn.bootcdn.net/ajax/libs/toastr.js/2.1.4/toastr.min.css");
document.getElementsByTagName("head")[0].appendChild(import_css);

var import_js = document.createElement('script');
import_js.setAttribute("type","text/javascript");
import_js.setAttribute("src", "https://cdn.bootcdn.net/ajax/libs/jquery/3.6.4/jquery.min.js");
document.getElementsByTagName("head")[0].appendChild(import_js);