nav.vue

<template>
    <el-container>
      <el-aside width="10%">
        <el-menu :default-active="$route.path" class="el-menu-vertical-demo" router :collapse="false">
          <div style="height:20%;text-align:center">
            <img src="../assets/logo.png" alt="" style="width:100%;height:63%">
          </div>


          <el-menu-item index="/nav/search">
            <i class="el-icon-search"></i>
            <span slot="title">检索合同</span>
          </el-menu-item>
          <el-menu-item index="/nav/contract/0">
            <i class="el-icon-plus"></i>
            <span slot="title">合同信息</span>
          </el-menu-item>
          <el-menu-item index="/nav/manage" v-show="management">
            <i class="el-icon-setting"></i>
            <span slot="title">后台管理</span>
          </el-menu-item>
          <el-menu-item index="" @click="exit">
            <i class="el-icon-back"></i>
            <span slot="title">退出</span>
          </el-menu-item>
          <el-menu-item index="" style="position:absolute;bottom:50px">
            <span slot="title">{{department}}&nbsp:&nbsp{{username}}</span>
          </el-menu-item>
        </el-menu>
      </el-aside>


      <el-main>
        <keep-alive include="search">
          <router-view></router-view>
        </keep-alive>
      </el-main>
    </el-container>

</template>

<script>
export default {
  name: "HelloWorld",
  data() {
    return {
      management: false,
      username: "",
      department: "",
      collapse: true
    };
  },

  methods: {
    exit() {
      this.$confirm("确认退出?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      })
        .then(() => {
          sessionStorage.removeItem("username");
          sessionStorage.removeItem("loginCheck");
          this.$router.push({ path: "/" });
        })
        .catch(() => {});
    }
  },
  beforeCreate() {
    if (!sessionStorage.getItem("loginCheck")) {
      alert("请登录");
      this.$router.push({ path: "/" });
    }
  },
  created() {
    this.username = sessionStorage.getItem("user_name");
    var roles = JSON.parse(sessionStorage.getItem("user_roles"));
    for (let i = 0; i < roles.length; i++) {
      const e = roles[i];
      if (e.role_unid == "91d5185d47e3bad099e17570b0dd0ed2") {
        this.management = true;
      }
      this.department = e.name;
    }
  }
};
</script>

<style>
.el-main {
  text-align: center;
}


.el-container,
.el-aside {
  height: 100%;
}
.el-menu {
  height: 100%;
}
</style>