src/components/page/SHeaderNotice.vue

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

<template>
  <a-popover trigger="click" placement="bottomRight" :overlayStyle="{ width: '300px' }">
    <template slot="content">
      <a-spin :spinning="loadding">
        <a-tabs>
          <a-tab-pane v-for="(tab, k) in tabs" :tab="tab.title" :key="k">

          </a-tab-pane>
        </a-tabs>
      </a-spin>
    </template>
    <span @click="fetchNotice" class="header-notice">
      <a-badge count="12">
        <a-icon style="font-size: 16px; padding: 4px" type="bell" />
      </a-badge>
    </span>
  </a-popover>
</template>

<script>
export default {
  name: 'HeaderNotice',
  props: {
    tabs: {
      type: Array,
      default: null,
      required: true
    }
  },
  data () {
    return {
      loadding: false
    }
  },
  methods: {
    fetchNotice () {
      if (this.loadding) {
        this.loadding = false
        return
      }
      this.loadding = true
      setTimeout(() => {
        this.loadding = false
      }, 2000)
    }
  }
}
</script>

<style lang="less" scoped>
  .header-notice {
    display: inline-block;
    transition: all 0.3s;

    span {
      vertical-align: initial;
    }
  }
</style>