meta: { requireAuth: true }

router.beforeEach((to, from, next) => {
  if (to.meta.requireAuth) {  // 需要權限
      //判斷當前是否擁有權限
      if (getUserInfo().user_sub) {
          next();
      } else {  // 無權，跳轉(zhuǎn)登錄
        mgr.signinRedirect();
      }
  } else {  // 不需要權限，直接訪問
      next();
  }
})

// router文件夾下的 index.js
import Vue from "vue";
import Router from "vue-router";
import routes from "./routes";  // 配置的路徑

Vue.use(Router);

const router = new Router({
  routes,
  scrollBehavior
  // mode: 'history'
});

const router = new Router({
  routes,
  scrollBehavior
  // mode: 'history'
});

router.beforeEach((to, from, next) => {
  if (to.matched.some(route => route.meta && route.meta.requiresAuth)) {
    if (!this.$storage.getStorage("userInfo")) {  // 沒有登錄信息跳轉(zhuǎn)到登錄頁
      next({
        path: "/login",
        query: { redirect: to.fullPath }  // 'to.fullPath'跳轉(zhuǎn)到登錄之前頁面的路徑
      });
    } else {
      next();
    }
  } else {
    next();
  }
});
export default router;

<template>
  <div class="login-container">
    <van-form @submit="onSubmit">
      <van-field v-model="username" label="用戶名" placeholder="用戶名" required />
      <van-field v-model="password" type="password" label="密碼" placeholder="密碼" required />
      <div style="margin: 40px 0 0 0;">
        <van-button round block type="info" size="small" native-type="submit">提交</van-button>
      </div>
    </van-form>
  </div>
</template>

<script>
import { webLogin } from '@/apis/apis'
export default {
  data() {
    return {
      username: '',
      password: '',
    }
  },
  created() { },
  methods: {
    onSubmit() {
      if (!this.username) {
        this.$notify({ type: "danger", message: "請?zhí)顚懹脩裘? });
        return;
      } else if (!this.password) {
        this.$notify({ type: "danger", message: "請?zhí)顚懨艽a" });
        return;
      }
      let params = {
        username: this.username,
        password: this.password
      }
      webLogin(params).then(res => {
        if (res.code == 0) {
          this.$notify({ type: 'success', message: '恭喜，登錄成功！' });
          // this.$router.push('/user'); 
          this.$storage.setStorage('userInfo', res.data);
          setTimeout(() => {
            let path = '/user';   // '/user' 為個人中心頁面
            if (this.$route.query.redirect) {
              path = this.$route.query.redirect   // 跳到之前的頁面
            }
            this.$router.push({
              path: path
            });
          }, 1000)
        } else {
          this.$notify(res.message)
        }
      })
    }
  }
}
</script>