JS获取当前页面的参数
var params = window.location.search.substring(1); // 返回参数
var url = window.location.href; // 返回完整 URL (https://www.runoob.com/html/html-tutorial.html)
var pathname = window.location.pathname; // 返回路径部分 (/html/html-tutorial.html)
var origin = window.location.origin; // 返回基础 URL (https://www.runoob.com/)
var domain = document.domain; // 返回域名部分 (www.runoob.com)
