按照网上的案例，一开始是这样写：
getUrlParams() {
const url = new URL("http://localhost:8888/#/login?loginname=123456&ticket=abcd");
const queryParams = new URLSearchParams(url.search);
const loginname = queryParams.get("loginname");
const ticket = queryParams.get("ticket");
console.log("loginname:", loginname);
console.log("ticket:", ticket);
}
用到的url.search：查询字符串，这是一个字符串包含一个 '?' 后面跟着 URL 的参数。
调试发现我的url.search没有值，于是改成用索引截取字符串，最终代码如下：
getUrlParams() {
var url = window.location.href;
const num = url.indexOf("?");
url = url.substring(num + 1);
const queryParams = new URLSearchParams(url);
const loginname = queryParams.get("loginname");
const ticket = queryParams.get("ticket");
console.log("loginname:", loginname);
console.log("ticket:", ticket);
}