Mason Freed

Should there be a declarative version of adoptedStyleSheets?

10

Once [declarative Shadow DOM](https://github.com/whatwg/dom/issues/831) is a thing, it would be very nice to be able to declaratively specify a (shared) `adoptedStyleSheets` value, by reference. This would avoid the need to...

Add link to declarative shadow dom opt-in

11

This PR goes along with the two in [HTML](https://github.com/whatwg/html/pull/5465) and [DOM](https://github.com/whatwg/dom/pull/892) to add declarative Shadow DOM to the spec. This PR goes along with the discussion at [#912](https://github.com/whatwg/dom/issues/912), to opt-in...

[CSS Anchored Positioning] Is "maintenance of logical order" really needed?

1

In [this section](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/CSSAnchoredPositioning/explainer.md#how-should-maintenance-of-logical-order-work) of the explainer, there is a discussion of the maintenance of logical order based on the `anchor` attribute. My question is whether this is needed at all,...

[CSS Anchored Positioning] Does the `anchor` IDL attribute reflect to the content attribute?

2

The anchor positioning proposal contains this proposed syntax: ```javascript document.getElementById('myPopup').anchor = document.getElementById('myButton'); ``` Quick question: when you execute that line on ``, do you get ``? What if you instead...

Is there something wrong with the use counting of deprecated (or all?) features?

6

Here are a couple example use counter plots: - The `` element: https://chromestatus.com/metrics/feature/timeline/popularity/1896 - The HTML `` element: https://chromestatus.com/metrics/feature/timeline/popularity/1897 - The Custom Elements v0 API: https://chromestatus.com/metrics/feature/timeline/popularity/457 - The HTML Imports...

[selectors] Add `:open` or `:top-layer` pseudo class

43

The CSSWG recently [resolved](https://github.com/w3c/csswg-drafts/issues/6965#issuecomment-1118033655) to add a `:modal` pseudo class that applies to elements that are "modal". That was general purpose, in that it should apply to anything that fits...

Change fullscreen CSS from `top`/`bottom`/`left`/`right` to `inset`

6

The fullscreen spec says this: ```css *|*:not(:root):fullscreen { top:0 !important; right:0 !important; bottom:0 !important; left:0 !important; } ::backdrop { top:0; right:0; bottom:0; left:0; } ``` For brevity and (small) performance...

Add declarative Shadow DOM features

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The explainer for this feature is here: https://github.com/mfreed7/declarative-shadow-dom/blob/master/README.md The issue discussion is here: https://github.com/whatwg/dom/issues/831 There is a corresponding [Pull Request](https://github.com/whatwg/dom/pull/892) for the DOM spec that goes along with this PR....

What's the right way to support mobile screens in the UA stylesheet?

4

For some historical context, see https://github.com/whatwg/html/issues/624 which is about a media query that used to be in the spec for the `` element. The original purpose was to support mobile...

[Selectmenu] Best practices for autofill and <selectmenu>

10

The [` proposal`](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/ControlUICustomization/explainer.md) allows for arbitrary HTML within the contained ``s. Further, it allows the developer to fully replace big chunks of the anatomy including the button and the listbox....