How can I check if one string contains a variable value in JavaScript?

Question

I have this code. I am using contains function to check if the value stored in the string or not but getting error. can anyone help me how to check this.

var lang = reply.LANGUAGES[InstObj.langId];
var instElement = reply.QUAL[iCount] ;

if(instElement.contains(lang))
{
    alert(lang);
}
else
{
    alert(instElement);
}

This might help stackoverflow.com/questions/1789945/… Use indexOf — Jason Evans
– Jason Evans, Commented Dec 20, 2013 at 11:25
Interestingly there is a contains() coming soon, but currently few browsers support it. — Andy
– Andy, Commented Dec 20, 2013 at 11:26
Don't confuse this with the contains method in jQuery tho. That's specifically a DOM method. — Andy
– Andy, Commented Dec 20, 2013 at 11:27

Satpal · Accepted Answer · 2013-12-20 11:26:41Z

3

Use indexOf()

The indexOf() method returns the index within the calling String object of the first occurrence of the specified value, starting the search at fromIndex, returns -1 if the value is not found.

Change your code as

var lang = reply.LANGUAGES[InstObj.langId];
var instElement = reply.QUAL[iCount] ;

if(instElement.indexOf(lang) > -1)
{
    alert(lang);
}
else
{
    alert(instElement);
}

answered Dec 20, 2013 at 11:26

Satpal

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