Javascript Google Maps API：TypeError：a 未定义
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Google Maps API: TypeError: a is undefined
提问by PHP Noob
I have searched this problem all over the web and none of them seem to give me any resolution. I have a simple script to just display the map of South Africa.
我已经在整个网络上搜索了这个问题，但似乎没有一个给我任何解决方案。我有一个简单的脚本来显示南非的地图。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge, chrome=1" />
<title>Map Test</title>
<script language="javascript" src="https://maps.googleapis.com/maps/api/js?sensor=true"></script>
<style>
#map-canvas {
height: 300px;
width: 980px;
margin: 0;
padding: 0;
margin-top: 10px;
}
</style>
</head>
<body>
<div id="map-canvas" class="map_canvas"></div>
<script type="text/javascript">
function initialize()
{
var mapOptions = {
center: new google.maps.LatLng(-29.09958,26.18434),
zoom: 5,
mapTypeControlOptions: {
position: google.maps.ControlPosition.TOP_LEFT
}
};
map = new google.maps.Map(document.getElementById('map-canvas'),mapOptions);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</body>
</html>
But I keep on getting the same error over and over. I have even tried on a different server.
但我一遍又一遍地得到同样的错误。我什至在不同的服务器上尝试过。
Please help
请帮忙
回答by Dr.Molle
I've also seen this error often in the last days, there seems to be an issue with the experimental API-version.
最近几天我也经常看到这个错误，实验 API 版本似乎有问题。
Load the release-version instead(basically you should always load the release-version in production)
改为加载发布版本（基本上你应该总是在生产中加载发布版本）
<script language="javascript" src="https://maps.googleapis.com/maps/api/js?sensor=true&v=3"></script>
回答by Daniela
Google Maps started to through errors when loading the script and on touch events. I'm using it for a cordova application on Android and iOS.
谷歌地图在加载脚本和触摸事件时开始出现错误。我将它用于 Android 和 iOS 上的cordova 应用程序。
These are the errors I get but changing the load version didn't solve it.
这些是我得到的错误，但更改加载版本并没有解决它。
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=MYKEY&v=3.21&libraries=geometry,places"></script>
回答by Luca Rainone
Version 3.30+ is affected of this problem if there is a global var called Map.
如果有一个名为Map.
ex:
前任：
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=YOURKEYHERE&v=3&callback=init" async defer></script>
<script type="text/javascript">
function init() {
Map.go();
}
var Map = {
go: function() {
console.log("start engine");
}
};
</script>
We got this error:
我们收到了这个错误：
TypeError: a.prototype is undefined
类型错误：a.prototype 未定义
Renaming window.Mapthen everything goes fine.
重命名window.Map然后一切顺利。
