'__e3_'为空或不是对象-Google Maps [英] '__e3_' is null or not an object - google maps
问题描述
消息:"_ e3 "为空或不是对象行:19字符:1068代码:0URI: http://maps.gstatic.com/intl/en_us/mapfiles/api-3/6/6/main.js
我真的对javascript毫无头绪，这是别人的代码，但是有人知道为什么它会在Internet Explorer中导致上述错误吗?
<！DOCTYPE html>< html>< head>< meta http-equiv ="content-type" content ="text/html; charset = UTF-8"/>< title> Google Maps JavaScript API v3示例:标记动画</title>< link href ="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel ="stylesheet" type ="text/css"/>< script type ="text/javascript" src ="http://maps.googleapis.com/maps/api/js?sensor=false"></script>< script type ="text/javascript">var stockholm = new google.maps.LatLng(59.32522，18.07002);var parliament = new google.maps.LatLng(59.327383，18.06747);var标记；var map;google.maps.event.addListener(marker，'drag'，function(event){document.getElementById("latbox").value = event.latLng.lat();document.getElementById("lngbox").value = event.latLng.lng();});函数initialize(){var mapOptions = {变焦:13mapTypeId:google.maps.MapTypeId.ROADMAP，中心:斯德哥尔摩};map = new google.maps.Map(document.getElementById("map_canvas")，mapOptions);marker = new google.maps.Marker({地图:地图，draggable:true，动画:google.maps.Animation.DROP，立场:议会});google.maps.event.addListener(marker，'drag'，toggleBounce);}函数toggleBounce(){如果(marker.getAnimation()！= null){marker.setAnimation(null);} 别的 {marker.setAnimation(google.maps.Animation.BOUNCE);document.getElementById("latbox").value = marker.getPosition().lat();document.getElementById("lngbox").value = marker.getPosition().lng();}}</script></head>< body onload ="initialize()">< div id ="map_canvas" style ="width:500px; height:400px;"> map div</div>纬度:<输入type ="text" id ="latbox" name ="latbox" style ="width:100px;">< br>长:<输入type ="text" id ="lngbox" name ="lngbox" style ="width:100px;"></body></html> 如果打开IE的开发人员工具，更改为脚本标签，然后开始调试，那么当页面刷新并发生错误时，开发人员工具将显示一个以您的调用为首的调用堆栈，以将侦听器添加到标记的拖动事件中，并且引用的 __ e3 _ 是标记的属性，但是尚未创建标记.
在创建 marker 后，将 addListener(marker ... )调用移至 initialize()函数中./p>
Message: '_e3' is null or not an object Line: 19 Char: 1068 Code: 0 URI: http://maps.gstatic.com/intl/en_us/mapfiles/api-3/6/6/main.js
I really have no clue on javascript and this is someone elses code, but does anyone know why it causes the above error in internet explorer?
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps JavaScript API v3 Example: Marker Animations</title>
<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var stockholm = new google.maps.LatLng(59.32522, 18.07002);
var parliament = new google.maps.LatLng(59.327383, 18.06747);
var marker;
var map;
google.maps.event.addListener(marker, 'drag', function(event){
document.getElementById("latbox").value = event.latLng.lat();
document.getElementById("lngbox").value = event.latLng.lng();
});
function initialize() {
var mapOptions = {
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP,
center: stockholm
};
map = new google.maps.Map(document.getElementById("map_canvas"),
mapOptions);
marker = new google.maps.Marker({
map:map,
draggable:true,
animation: google.maps.Animation.DROP,
position: parliament
});
google.maps.event.addListener(marker, 'drag', toggleBounce);
}
function toggleBounce() {
if (marker.getAnimation() != null) {
marker.setAnimation(null);
} else {
marker.setAnimation(google.maps.Animation.BOUNCE);
document.getElementById("latbox").value=marker.getPosition().lat();
document.getElementById("lngbox").value=marker.getPosition().lng();
}
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width: 500px; height: 400px;">map div</div>
Lat:<input type="text" id="latbox" name="latbox" style="width:100px;" >
<br>
Long:<input type="text" id="lngbox" name="lngbox" style="width:100px;" >
</body>
</html>
If you open IE's developer tools, change to the script tag, and start debugging, then when the page refreshes and the error occurs, the developer tools will show a call stack headed by your call to add a listener to the drag event of a marker, and the __e3_ being referenced is a property of the marker, but you have not created the marker.
Move the addListener(marker ... call to within the initialize() function, after you've created the marker.
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