June 2021
Intermediate to advanced
290 pages
9h 21m
Chinese
Content preview from Node与Express开发（第2版）
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集成第三方
API
｜
227
console.log('DONE')
db.close()
})
.catch(err => {
console.error('ERROR: ' + err.message)
db.close()
})
当你运行完这个脚本（
node db-geocode.js
），应该能看到，所有的度假产品都已经成功地
完成地理编码了。既然已经有了地理位置信息，接下来学习如何在地图中显示出来……
19.2.3
显示地图
在地图上显示这些度假地点虽然说可以归类为“前端”工作，但是我们已经做了这么多，
如果看不到成果，无疑很让人失望。因此我们准备稍微偏离一下本书主要关注的后端，看
看如何在地图上显示合作商户的位置，这些位置是刚刚做完地理编码得到的。
我们在做地理编码时已经创建了一个谷歌的
API key
，现在还需要启用地图
API
。进入你
的谷歌控制台，点击
APIs
，找到地图
JavaScript
API
，如果还没有启用的话就启用它。
现在创建一个视图
views/vacations-map.handlebars
，用来显示度假产品地图
。一开始只是显
示这个地图，下一步再增加度假地点：
<div id="map" style="width: 100%; height: 60vh;"></div>
<script>
let map = undefined
async function initMap() {
map = new google.maps.Map(document.getElementById('map'), ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.