让IE8浏览器支持function.bind()方法_JavaScript

让IE8浏览器支持function.bind()方法

2021-04-02 20:19JavaScript教程网 JavaScript

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

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									<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：

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									<!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>