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Scripts can modify stylesheets using the CSSOM functions like [`CSSStylesheet.insertRule()`](https://developer.mozilla.org/en-US/docs/Web/API/CSSStyleSheet/insertRule), [used](https://github.com/emoti…
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Is there a typo in the description of the [dom element `scroll()` method](https://drafts.csswg.org/cssom-view/#dom-element-scroll)?
>8. If the element is the [root element](https://w3c.github.i…
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The clientX/clientY and screenX/screenY properties should return the same value according to my reading of https://drafts.csswg.org/cssom-view/#dom-mouseevent-screenx and https://drafts.csswg.org/csso…
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"GeometryUtils" - part of the CSSOM. Provides much better position information than existing methods.
Spec: http://dev.w3.org/csswg/cssom-view/#the-geometryutils-interface
Tutorial: https://…
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The [Multi-Screen Window Placement](https://w3c.github.io/window-placement/) spec suggests enhancements for supporting multi-screen devices. I would greatly appreciate feedback and help regarding inte…
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This is possibly more of a Chrome bug than a spec issue but I thought I'd check: how should `brightness(0.5)` and `brightness(50%)` be serialized. As-is?
Given [this fiddle](https://jsfiddle.net/po…
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Discussion started in https://github.com/w3c/csswg-drafts/issues/5044. The main idea is to expose the device pixel ratio for ``, allowing authors to select an optimal content resolution. UAs on TV's a…
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https://drafts.csswg.org/cssom-view/#dom-element-scrollintoview defines what happens when you call this method on an element. There are non-element things one can want to scroll into view - text nodes…
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CSSOM generates a variety of partial IDL fragments for each supported property, where:
> The term supported CSS property refers to a CSS property that the user agent implements, including any vendo…
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From Web Platform Tests issue (https://github.com/web-platform-tests/wpt/issues/17925)
In [`background-blend-mode`](https://drafts.fxtf.org/compositing-1/#background-blend-mode) and most of the oth…