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A BBC navigation bar component broke depending on the external monitor

(www.joshtumath.uk)
293 points ulrischa | 1 comments | 18 Nov 24 15:28 UTC | HN request time: 0s | source
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account42 ◴[18 Nov 24 16:38 UTC] No.42174070[source]▶
Why are websites getting mouse position in screen coordinates in the first place?
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Sayrus ◴[18 Nov 24 16:51 UTC] No.42174236[source]▶
I've searched for reasons and couldn't find much. The fact that a website can know where a browser window is located (window.screenX/window.screenY) and that clicks position can be reported in that coordinate system sounds insane for a desktop. TOR Browser seems to spoof screenX and screenY to avoid fingerprinting.

Has anyone seen good use-cases for that feature? I'm thinking about dual window applications that interacts with each other (I think I saw a demo of something like this a while ago on HN but I wasn't able to find it again), or sites where behavior depends on their location on the virtual screen.

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1. willwade ◴[18 Nov 24 18:37 UTC] No.42175446[source]▶
Back in html 4 days we did this shenanigans all the time. I worked on very over the top sites that played with multiple windows talking to each other and moving in synchrony. I’ve tried looking for examples on archive.org (eg I know we did this a ton on flash heavy sites like design museum in London ) but alas the ones I was looking for a broken in that archive.