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I want to know how "location"(window.location) object is compared in javascript i.e. which values are taken into consideration while comparing two "location" objects.

Suppose i have top.location = "http://www.abc.com" and self.location = "http://www.abc.com". If i compare them as (top.location == self.location), it gives false. Whereas, if i compare them as (top.location.href == self.location.href), it will gives true.

Can anyone explain why this happens?

Thanks in advance.

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top.location and self.location are Location objects. Objects in JavaScript can't be directly compared using == or ===, which is why top.location != self.location.

Since top.location.href and self.location.href are conventional strings, they can be compared as usual using == or, better, ===.

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15 Comments

+1 I Objects can't be compared in JS. Thanks for letting us to know.
Yeah. So, is it that objects in javascript cannot be compared? Since, frame busting code uses top.location!=self.location and it works correctly.
I doubt it, they must be doing something else, although top.location!=self.location always equals true meaning the frame will always "bust"
Isn't there any method to achieve top.location==self.location?
Objects CAN be compared using == (property by property) or === (by reference).
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