vue通过获取url中的信息登录页面的代码详解

<script>
 
  let getRequest = function () {
    var url = location.href
    // 从 URL 中提取查询参数部分
    const queryParamsString = url.split('?')[1];
    // 使用 URLSearchParams 解析查询参数
    const queryParams = new URLSearchParams(queryParamsString);
    // 获取特定参数的值
    const userName = queryParams.get('userName');
    const loginMode = queryParams.get('loginMode');
    localStorage.setItem("userName",userName)
    localStorage.setItem("loginMode",loginMode)
  }
 
  getRequest()
</script>

  created() {
    this.loginInfo.userAcct = localStorage.getItem("userName") || "";
    this.loginInfo.loginMode = localStorage.getItem("loginMode") || "";
    if (this.loginInfo.userAcct !== "" && this.loginInfo.loginMode !== "") {
          // 直接在localstroage获取的信息 调用登录接口
        $login(this.loginInfo)
        .then((res) => {
          this.handleLoginInfo(res);
        })
        .catch((err) => {
          console.log(err);
        });
    }
    // this.getCode();
    // this.getSecretKey();
    // this.getRemInfo();
    this.enterEvent(); // 回车键登录
  },

    handleLoginInfo(res) {
      if (res.code === 200) {
        this.$message.success("登录成功！");
        //储存token,账号，密码
        this.$store.commit("set_token", res.data.token);
        this.$store.commit("set_userAcct", this.loginInfo.userAcct);
        this.$store.commit("set_password", this.loginInfo.password);
        this.$store.commit("set_tenantCode", this.loginInfo.tenantCode);
        this.$store.commit("set_userInfo", res.data.userInfo);
        let params = {
          userId: res.data.userInfo.sysUser.userId,
        };
        params = this.$qs.stringify(params);
        this.getMenuTreeSelect(res.data.userInfo.sysUser.userId);
        this.getDeptTreeSelect();
        //若用户选择记住密码
        if (this.isRemPwd) {
          this.$Cookie.set("userAcct", this.loginInfo.userAcct, {
            expires: 30,
          });
          this.$Cookie.set("tenantCode", this.loginInfo.tenantCode, {
            expires: 30,
          });
          //将密钥一起加密储存，后续解密时要用到
          this.$Cookie.set(
            "sk",
            CryptoJS.AES.encrypt(this.secretKey, "de43a68e4d184aa3"),
            {
              expires: 30, // 存储30天
            }
          );
          this.$Cookie.set(
            "thinglinkpwd",
            CryptoJS.AES.encrypt(this.loginInfo.password, this.secretKey),
            {
              expires: 30, // 存储30天
            }
          );
          // this.$router.go(0)
        } else {
          // 删除cookie
          this.$Cookie.remove("userAcct");
          this.$Cookie.remove("thinglinkpwd");
          this.$Cookie.remove("sk");
          this.$Cookie.remove("tenantCode");
        }
        // 去往首页
        this.$router.push("/index");
        //修改下首页默认的路径和菜单名称，确保一下侧边栏以及面包屑的正常展示，换首页了记得改下
        this.$store.commit("set_activeIndex", "/index");
        this.$store.commit("set_menuName", ["首页"]);
      }
    },