Re: [w3c/uievents] definition of MouseEvent.clientX and clientY seems wrong (Issue #339)

That's correct - The main window and each iframe establish their own [viewport](https://drafts.csswg.org/css2/#viewport) and the client coordinates are relative to that; so I agree with @mustaqahmed 

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Received on Tuesday, 3 January 2023 16:36:44 UTC