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前端_公共页头
=============

1 添加页头组件

/src/components/Header.vue：

<template>
  <div class="content">
    <h3>欢迎来到小熊和小兔的博客</h3>
    <div class="block">
      <el-avatar :size="50" :src="require('@/avatars/' + user.avatar)">
      </el-avatar>
      <div>{{user.username}}</div>
    </div>

    <div class="action">
      <span><el-link href="/list">主页</el-link></span>

      <el-divider direction="vertical"></el-divider>
      <span><el-link type="success" href="/new">发表</el-link></span>

      <el-divider direction="vertical"></el-divider>
      <span v-show="!hasLogin"><el-link type="primary" href="/login">登录
      </el-link></span>

      <span v-show="hasLogin"><el-link type="danger" @click="logout">退出
      </el-link></span>
    </div>
  </div>
</template>

<script>
  export default {
    name: "Header",
    data() {
      return {
        user: {
          username: '请先登录',
          avatar: 'user.png'
        },
        hasLogin: false
      }
    },
    methods: {
      logout() {
        const _this = this
        _this.$axios.get("/logout", {
          headers: {
            "Authorization": localStorage.getItem("token")
          }
        }).then(response => {
          _this.$store.commit("REMOVE_ALL")
          _this.$router.push("/login")
        })
      }
    },
    created() {
      if(this.$store.getters.getUser.username) {
        this.user.username = this.$store.getters.getUser.username
        this.user.avatar = this.$store.getters.getUser.avatar
        this.hasLogin = true
      }
    }
  }
</script>

<style scoped>
  .content {
    max-width: 960px;
    margin: 0 auto;
    text-align: center;
  }
  .action {
    margin: 10px 0;
  }
</style>

2 使用页头组件

/src/views/List.vue：

<template>
  <div>
    <Header/>
  </div>
</template>

<script>
import Header from "@/components/Header"

export default {
  name: "List",
  components: {Header}
}
</script>

<style scoped>

</style>

3 运行测试

http://localhost:8080/list