window.Map不是Google Maps API v3中的构造函数 [英] window.Map is not a constructor in Google Maps API v3
本文介绍了window.Map不是Google Maps API v3中的构造函数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个带有新密钥的google map
I have a google map with a new key
但是在控制台中出现错误
but it gets error in console
错误:
Uncaught TypeError: window.Map is not a constructor
at Zr (map.js:2)
at ds.release (map.js:53)
at gs (map.js:5)
at _.rl.Ab (map.js:59)
at map.js:46
HTML
<head>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=mykey">
</script>
</head>
<body onload="init()">
<div id="map_canvas"></div>
</body>
<script src="js/index.js"></script>
index.js
Map = null;
function init() {
var mapOptions = {***};
Map = new google.maps.Map( document.getElementById( "map_canvas" ), mapOptions );
}
感谢您的时间！
推荐答案
地图在EcmaScript中是保留字，因此您不应将其用作变量名:
Map is reserved word in EcmaScript, so you shouldn't use it as a variable name: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map
问题是这一行(jsfiddle认为Map是只读的):
The problem is this line (jsfiddle thinks Map is read only):
Map = null;
将地图变量重命名为其他名称(如map，用小写的"m"表示).
Rename your map variable to something else (like map, with a lower case "m").
代码段:
map = null;
function init() {
var mapOptions = {
center: {
lat: 0,
lng: 0
},
zoom: 1
};
map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
}
google.maps.event.addDomListener(window, "load", init);
html,
body,
#map_canvas {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}
<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map_canvas"></div>
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