CSSOM View Module by World Wide Web Consortium (source code)

= CSSOM View Module by World Wide Web Consortium
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https://www.w3.org/TR/2025/WD-cssom-view-1-20250916/

W3C Working Draft, 16 September 2025. Section 2.2 distinguishes page zoom and visual-viewport scale; Window.devicePixelRatio algorithm divides CSS pixel size at current page zoom by output-device pixel size.