Re: [w3c/uievents] Mouse coordinates represented in CSS pixels do not account for retina displays with window.devicePixelRatio > 1 (#40) from Rick Byers on 2024-05-12 (public-webapps-github@w3.org from May 2024)

From: Rick Byers <notifications@github.com>
Date: Sun, 12 May 2024 01:37:13 -0700
To: w3c/uievents <uievents@noreply.github.com>
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Message-ID: <w3c/uievents/issues/40/2106167855@github.com>

Is it perhaps time to revisit this? CSSOM View spec has long re-defined MouseEvent coordinates as double, and that's what we've shipped in Chromium for a decade now (except that we still round for mouse events for web compat). The difference continues to cause confusion, like [this](https://x.com/FreyaHolmer/status/1788886907700584686) recent twitter thread. Fractional coordinates are really critical for some polished UIs like touch-based dragging and drawing.

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Received on Sunday, 12 May 2024 08:37:17 UTC