url: https://www.baidu.com?test=111

let url = new URL(window.location.href);
let parameterZ = url.searchParams.get("test");
console.log(parameterZ); // 111

如果获取没有的属性返回null

let id = url.searchParams.get("id"); // null

获取url里面参数新方法 URLSearchParams.get()