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Re:Polypane – Browser for Developers by etaioinshrdlu on Sunday April 26, 2020 @12:54AM (#22984556)
So what happens when JS queries the size of something?

Is the answer only correct for one pane?

I can only imagine that this is a big source of pain once any JS gets involved. It doesn't sound like a very solvable problem.

Re:Polypane – Browser for Developers by kilian on Sunday April 26, 2020 @02:48AM (#22985104)
JavaScript runs inside your panes so whatever you measure in JavaScript is correct in each pane.