javascript 不支持 IE 8 中的 indexOf？
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No support for indexOf in IE 8?
提问by AabinGunz
I have a requirement where I create radio buttons dynamically based upon JSON response. So far what I did works in Chrome and firefox, but gives Object doesn't support this property or methodon if(subItem[1].indexOf(",") >= 0)line
我需要根据 JSON 响应动态创建单选按钮。到目前为止，我所做的Chrome和Firefox的作品，但给Object doesn't support this property or method上if(subItem[1].indexOf(",") >= 0)线
My code
我的代码
$("#sList").live("change", function(){
var currentService=this.value;
var c1Svc=[];
var c2Svc=[];
if(absP.length==2)
{
$.each(compareServiceData,function(i,item){
if(currentService==item[0])
{
var configCount=0;
$.each(item[1],function(j,subItem){
var temp=subItem[1];
/*The JSON response contains List of Lists, so here if it contains a list it will be separated by "," so split it and store in a array, else directly store in a array*/
if(subItem[1].indexOf(",") >= 0)
{
var tList=temp.split(",");
$.each(tList,function(k,val){
if(configCount==0)
{
c1Svc.push(val);
}
else
{
c2Svc.push(val);
}
});
}
else
{
if(configCount==0)
{
c1Svc.push(subItem[1]);
}
else
{
c2Svc.push(subItem[1]);
}
}
configCount++;
});
}
});
if ($("#customServiceListing").length == 0)
{
$("#compareContent").append('<table id="customServiceListing" align="center" width="90%" class="csm-table" border="1"><tbody><tr><td><form id="c1Service"></form></td><td><form id="c2Service"></form></td></tr></tbody></table>');
}
else
{
$('#c1Service').empty();
$('#c2Service').empty();
}
}
else
{
$("#compareContent").append('<table align="center" width="90%" class="csm-table" border="1"><tbody><tr><td><form><select id="c1Service"></select></form></td><td><select id="c2Service"></select></td><td><select id="c3Service"></select></td></tr></tbody></table>');
}
/*adding service radios to config1*/
$.each(c1Svc,function(i,item){
$("#c1Service").append('<input type="radio" name="customConfig1ServiceNames" id="'+item+'" value="'+i+1+'"/>'+item);
});
if(c1Svc.length>1)
$("#c1Service").append('<br/>');
/*adding service radios to config2*/
$.each(c2Svc,function(i,item){
$("#c2Service").append('<input type="radio" name="customConfig2ServiceNames" id="'+item+'" value="'+i+1+'"/>'+item);
});
if(c2Svc.length>1)
$("#c2Service").append('<br/>');
});
Update
更新
Hereis a List of various function code not supported by IE8
这是IE8不支持的各种功能代码列表
UpdateWhat is the problem here, for every value it gives me -1I am using code given by Sudhir
更新这里有什么问题，对于它给我的每个值，我-1使用的是 Sudhir 提供的代码
alert(subItem[1].indexOf(",")+", "+subItem[1]);
alert(subItem[1].indexOf(",")+", "+subItem[1]);
Screenshot
截屏
Update
更新
Got it here, var temp=subItem[1].toString();was the problem, converting it to String worked.
到了这里，var temp=subItem[1].toString();是问题所在，将其转换为 String 有效。
回答by Sudhir Bastakoti
IE versions < 9 don't have indexOf, so you can add your own:
IE 版本 < 9 没有indexOf，因此您可以添加自己的：
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function (elt /*, from*/) {
var len = this.length >>> 0;
var from = Number(arguments[1]) || 0;
from = (from < 0) ? Math.ceil(from) : Math.floor(from);
if (from < 0) from += len;
for (; from < len; from++) {
if (from in this && this[from] === elt) return from;
}
return -1;
};
}
var subItem = [];
subItem[1]="CSMTestPWXListinerService,CSMTestPWXListinerService_ManualyAdded";
console.log(subItem[1].indexOf(","));
//returns 25
回答by Vanji
According to http://msdn.microsoft.com/en-us/library/ie/53xtt423(v=vs.94).aspx
根据http://msdn.microsoft.com/en-us/library/ie/53xtt423(v=vs.94).aspx
MS has said that it support indexof() to IE8 as well!
MS 说它也支持 indexof() 到 IE8！
回答by davidethell
What happens if you do this instead?:
如果你这样做会发生什么？：
if(temp.indexOf(",") >= 0)
I know I've had cases where it seemed to not understand what the object type was when reference from an array instead of a variable created from the contents of that array location. It doesn't make sense that this would be the case, but I've used it as a workaround before.
我知道我遇到过这样的情况，当从数组而不是从该数组位置的内容创建的变量进行引用时，它似乎不明白对象类型是什么。这种情况是没有意义的，但我以前曾将其用作解决方法。
