如何将百度地图包装成Vue的组件的方法步骤

<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=piXQ5CgHFqEefqCVbhhBFfe6HjF7l4zW "></script>

externals: {
  "BMap": "BMap" 

}, 

<!-- 页面模版 -->
<template>
 <div>
  <!--header-->
  <com-header :title="headerData.title" :toLink="headerData.toLink"></com-header>
  <!--header end-->
 
  <!--container-->
  <div id="allmap" 
      style="
        width: 100%; 
        height:200px; 
        border: 1px solid gray;
        overflow:hidden;">
    </div>
  <!--container end-->
 </div>
</template>
<script>
import comHeader from 'components/comHeader'
import BMap from 'BMap'
export default {
 components: {
  comHeader
 },
 data: () => ({
  headerData: {
   title: '网点详情',
   toLink: '/SalesOutlets'
  }
 }),
 created () {
  // 组件创建完后获取数据，这里和1.0不一样，改成了这个样子
  this.loadMap()
  // this.ready() // 如果在此处直接调用this.ready()方法，将无法加载地图
 },
 mounted () {
  this.ready()
 },
 methods: {
  loadMap: function () {
   console.log(this.$route.params.name)
   console.log(this.$route.params.addr)
   console.log(this.$route.params.phone)
   // setTimeout(this.ready, 0)
  },
  ready: function () {
   var map = new BMap.Map('allmap')
   map.enableScrollWheelZoom(true)
   console.log(map)
 
   var localSearch = new BMap.LocalSearch(map)
   // localSearch.enableAutoViewport() // 允许自动调节窗体大小
   map.clearOverlays() // 清空原来的标注
   localSearch.setSearchCompleteCallback(function (searchResult) {
    var poi = searchResult.getPoi(0)
    map.centerAndZoom(poi.point, 20)
    var point = new BMap.Point(poi.point.lng, poi.point.lat)
    var marker = new BMap.Marker(point) // 创建标注，为要查询的地方对应的经纬度
    map.addOverlay(marker)
   })
   localSearch.search(this.$route.params.addr)
  }
 }
}
</script>
<style>
 /* 去掉地图左下角的百度LOGO */
 .anchorBL {
  display:none
 }
</style>

<b-map-component></b-map-component>