让IE8浏览器支持function.bind()方法

2024-05-06 16:09:47

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function.bind()方法默认IE8是不支持的，下面有个小技巧可完美解决这个问题，为此疑惑的朋友可以看看

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>