Javascript IN operator compatibility

Posted by jAndy on Stack Overflow See other posts from Stack Overflow or by jAndy
Published on 2010-05-27T11:46:21Z Indexed on 2010/05/27 11:51 UTC
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Hi Folks,

Can someone tell me since which ECMA version the IN operator is available and which browsers (versions) support it ?

Explanation:

The IN-operator can be used like the following:

var myObject = {
    Firstname: 'Foo',
    Lastname: 'Bar'
};

if('Lastname' in myObject){
    // Lastname is an attribute of myObject
}

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