what is the alternate function for indexOf for string in IE8?

I have used indexOf to check whether i have particular text is present in a sentence or not like the following

var temp = "";
temp="data not available";
if(temp.indexOf("datas") == 0){
    alert("True");
}
else{
    alert("false");
}

The problem i was facing is indexOf is not supported in Internet Explorer 8 . How to perform this operation in IE8 too? Is there any default alternate functions available in jquery?

I tried inArray but it supports only array.

fiddle


I think you're confused about which indexOf() is supported.

You're using String.prototype.indexOf() , which is supported from IE6 onwards, according to Microsoft's documentation.

It's Array.prototype.indexOf() that's only supported from IE9 onwards.


You can use String.search :

var temp = "data not available";
if(!temp.search("datas")){
    alert("True");
} else {
    alert("false");
}

Fiddle

(NB: I don't have IE8 to test it)

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