让IE8浏览器支持function.bind()方法

前端技术 2023/09/04 JavaScript

IE8支持function.bind()方法

<script type=\"text/javascript\"> 
if (!Function.prototype.bind) { 
Function.prototype.bind = function (oThis) { 
if (typeof this !== \"function\") { 
throw new TypeError(\"Function.prototype.bind - what is trying to be bound is not callable\"); 
} 
var aArgs = Array.prototype.slice.call(arguments, 1), 
fToBind = this, 
fNOP = function () {}, 
fBound = function () { 
return fToBind.apply(this instanceof fNOP && oThis 
? this 
: oThis, 
aArgs.concat(Array.prototype.slice.call(arguments))); 
}; 
fNOP.prototype = this.prototype; 
fBound.prototype = new fNOP(); 
return fBound; 
}; 
} 
</script>

主要解决“百度地图”官网上的例子的bug，摘取如下代码：

<!DOCTYPE html> 
<html> 
<head> 
<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" /> 
<meta name=\"viewport\" content=\"initial-scale=1.0, user-scalable=no\" /> 
<style type=\"text/css\"> 
body, html {width: 100%;height: 100%;margin:0;font-family:\"微软雅黑\";} 
#allmap{width:100%;height:500px;} 
p{margin-left:5px; font-size:14px;} 
</style> 
<script type=\"text/javascript\" src=\"http://api.map.baidu.com/api?v=2.0&ak=39b92e64ae5622663ceceaccd8ab8eb1\"></script> 
<script src=\"http://libs.baidu.com/jquery/1.9.0/jquery.js\"></script> 
<title>给多个点添加信息窗口</title> 
<script type=\"text/javascript\"> 
if (!Function.prototype.bind) { 
Function.prototype.bind = function (oThis) { 
if (typeof this !== \"function\") { 
throw new TypeError(\"Function.prototype.bind - what is trying to be bound is not callable\"); 
} 
var aArgs = Array.prototype.slice.call(arguments, 1), 
fToBind = this, 
fNOP = function () {}, 
fBound = function () { 
return fToBind.apply(this instanceof fNOP && oThis 
? this 
: oThis, 
aArgs.concat(Array.prototype.slice.call(arguments))); 
}; 
fNOP.prototype = this.prototype; 
fBound.prototype = new fNOP(); 
return fBound; 
}; 
} 
</script> 
</head> 
<body> 
<div id=\"allmap\"></div> 
<p>点击标注点，可查看由纯文本构成的简单型信息窗口</p> 
</body> 
</html> 
<script type=\"text/javascript\"> 
// 百度地图API功能 
map = new BMap.Map(\"allmap\"); 
map.centerAndZoom(new BMap.Point(116.417854,39.921988), 15); 
var data_info = [[116.417854,39.921988,\"地址：北京市东城区王府井大街88号乐天银泰百货八层\"], 
[116.406605,39.921585,\"地址：北京市东城区东华门大街\"], 
[116.412222,39.912345,\"地址：北京市东城区正义路甲5号\"] 
]; 
var opts = { 
width : 250, // 信息窗口宽度 
height: 80, // 信息窗口高度 
title : \"信息窗口\" , // 信息窗口标题 
enableMessage:true//设置允许信息窗发送短息 
}; 
for(var i=0;i<data_info.length;i++){ 
var marker = new BMap.Marker(new BMap.Point(data_info[i][0],data_info[i][1])); // 创建标注 
var content = data_info[i][2]; 
map.addOverlay(marker); // 将标注添加到地图中 
marker.addEventListener(\"click\",openInfo.bind(null,content)); 
} 
function openInfo(content,e){ 
var p = e.target; 
var point = new BMap.Point(p.getPosition().lng, p.getPosition().lat); 
var infoWindow = new BMap.InfoWindow(content,opts); // 创建信息窗口对象 
map.openInfoWindow(infoWindow,point); //开启信息窗口 
} 
</script>

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