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Created page with 'When implementing the <code>navigator.pointer</code> [https://github.com/humphd/mozilla-central/blob/b9be545b1ab71aa12b337b63a1967bea1960f9af/dom/interfaces/base/nsIDOMNavigator.…'
When implementing the <code>navigator.pointer</code> [https://github.com/humphd/mozilla-central/blob/b9be545b1ab71aa12b337b63a1967bea1960f9af/dom/interfaces/base/nsIDOMNavigator.idl#L63 change to nsIDOMNavigator.idl], I noticed that none of the other recent additions to navigator were included in the interface file (e.g., geolocation). Today I noticed that these are actually done in separate interfaces, which expose a single attribute. I assume this was done so as to not alter the UUID for the Navigator Interface, or so as to separate the original definition of Navigator without recent changes. TODO: ask dougt why this decision was made.

<pre>
20:31 < humph> dougt: question for you
20:32 < humph> what was the reason you extended Navigator using
nsIDOMNavigator* (e.g., new interface with single properties) vs
dropping on nsIDOMNavigator. Was it to not touch the uuid, or
to leave the interface unaltered or ?
20:33 < dougt> humph: its the COM way of doing things.
20:34 < dougt> but, in reality, you could do either
20:34 < dougt> i do not know of anyone looking for a specific uuid
20:34 < roc> these days we just extend the main interface
20:34 < dougt> they usually get the navigator object off of window.
20:34 < roc> we're reducing the number of interfaces
20:34 < dougt> roc: that is good
20:34 < dougt> it does break anyone looking for a specific id
20:34 < dougt> but, i don't think we should support that if it means cost
20:35 < dougt> humph: you should ask jst what he wants to do.
20:35 < khuey> well, you use separate interfaces if you want it to be preffable
20:35 < dougt> that is one way.
20:35 < khuey> indexedDB works like that
20:36 < dougt> for dom/* we should just defer to JST unless we have data that
it hurts doing it this way
</pre>

TODO: connect with jst and figure out which way to go.

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