February 2021 - webkit-dev - lists.webkit.org

Request for position on Import Conditions
by Daniel Clark 09 Mar '21

09 Mar '21

Hello WebKit-dev, I'd like to ask for WebKit's official position on import conditions, as described in the explainer at [1]. This proposal adds an inline syntax for module import statements to pass on more information alongside the module specifier. It includes support for JSON modules as a primary application, with the "type" condition used to mitigate the security issue described in [2] that previously blocked their adoption in HTML. The proposal is designed such that other conditions can be added in the future for additional use cases, some of which may not yet be anticipated. The champion group is particularly interested in your opinion on whether it's acceptable for import conditions to not be part of the module map key. The current state of our HTML spec integration PR at [3] is that they are not part of the module map key. We perform module map caching such that there will always be no more than a single fetch for a given module specifier regardless of failed module type checks. The thread at [4] discusses this issue in detail. We plan to request Stage 3 for this proposal at the upcoming TC39 meeting beginning on July 20. [1] Explainer: https://github.com/tc39/proposal-import-conditions [2] Modules MIME-type security issue: https://github.com/w3c/webcomponents/issues/839 [3] HTML Spec integration PR: https://github.com/whatwg/html/pull/5658 [4] HTML integration thread: https://github.com/whatwg/html/issues/5640 Mozilla standards-position ("worth prototyping") https://github.com/mozilla/standards-positions/issues/373 Thanks! Dan Clark

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Request for position: CSS custom counter style
by Xiaocheng Hu 25 Feb '21

25 Feb '21

Hi webkit-dev, This is a request for WebKit's position on CSS custom counter style (@counter-style rule). The spec status is Candidate Recommendation. Firefox has shipped it in 2014, while Chrome is planning to ship it by M90 in April 2021. Explainer: https://developer.mozilla.org/en-US/docs/Web/CSS/@counter-style Spec: https://drafts.csswg.org/css-counter-styles-3 Summary: The CSS @counter-style rule allows web authors to specify and use custom counter styles in list markers and CSS counters. This helps web internationalization. Thanks!

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Position on emerging standard: Declarative Shadow DOM
by Mason Freed 24 Feb '21

24 Feb '21

Hello WebKit! I would like to request an official WebKit position on the Declarative Shadow DOM proposal. There have been some great comments and discussion from WebKit folks on the issue thread, but it is a bit unclear whether the overall proposal is something WebKit would support. This was brought up and discussed, e.g., on the DOM spec PR here: https://github.com/whatwg/dom/pull/858#issuecomment-623735890 Please see below for all of the relevant supporting documents and discussions. Explainer: https://github.com/mfreed7/declarative-shadow-dom/blob/master/README.md WhatWG DOM Issue discussion: https://github.com/whatwg/dom/issues/831 HTML Spec PR: https://github.com/whatwg/html/pull/5465 DOM Spec PR: https://github.com/whatwg/dom/pull/858 TAG review: https://github.com/w3ctag/design-reviews/issues/494 Request for Mozilla Position: https://github.com/mozilla/standards-positions/issues/335 Thanks, Mason Freed

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Request for position: WebAssembly SIMD
by Deepti Gandluri 23 Feb '21

23 Feb '21

Hello, This is a request for WebKit position on the WebAssembly SIMD proposal, which is now at Phase 4 <https://github.com/WebAssembly/proposals#phase-4---standardize-the-feature-…> as of the last WebAssembly CG meeting on 2/16/2021. Chrome is planning to ship WebAssembly SIMD in 91. Proposal: https://github.com/WebAssembly/simd/tree/master/proposals/simd Specification: https://github.com/WebAssembly/simd/tree/master/document/core ChromeStatus: https://www.chromestatus.com/feature/6533147810332672 Thanks, Deepti Gandluri

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Request for position: CSS @font-face descriptor advance-override
by Xiaocheng Hu 23 Feb '21

23 Feb '21

Hi webkit-dev, This is a request for WebKit's position on a new descriptor 'advance-override' of the CSS @font-face rule. This is a new feature that the CSSWG just added into CSS Fonts Level 5 for reducing layout shifting caused by web fonts. Chrome has already implemented it in M90 behind a flag. Explainer: https://gist.github.com/xiaochengh/3aae8a97d1b0388c8e701819b63e2c49 Spec: https://drafts.csswg.org/css-fonts-5/#font-metrics-override-desc May I assume https://github.com/w3c/csswg-drafts/pull/5991, authored by Myles, as a positive signal? Thank you!

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EWS down for emergency maintenance
by Aakash Jain 20 Feb '21

20 Feb '21

Hi Everyone, EWS (including commit-queue) is currently down for emergency maintenance. Status bubbles on existing Bugzilla bugs should still keep loading. I'll send an update when the maintenance is complete. Thanks Aakash

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Request for opinion on WPT RFC 72
by Titouan Rigoudy 18 Feb '21

18 Feb '21

Hi there, I'm seeking an opinion on Webkit's part on Web Platform Tests RFC #72 [1], for which I filed a Webkit bug [2] some time ago. Please see the bug and the RFC for some more details about the proposal. Thanks, Titouan [1] https://github.com/web-platform-tests/rfcs/pull/72 [2] https://bugs.webkit.org/show_bug.cgi?id=219642

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Position on WebXR Depth Sensing Module
by Piotr Bialecki 16 Feb '21

16 Feb '21

Hello, WebKit! I'd like to ask for WebKit's position on WebXR Depth Sensing Module. It is an extension of WebXR Device API that allows the sites to query the underlying XR devices for the depth information based on users' environment (i.e. distance from view's plane to the real world). The standardization efforts are happening in the Immersive Web Community Group. More details can be found in: Explainer - https://github.com/immersive-web/depth-sensing/blob/main/explainer.md Spec draft - https://immersive-web.github.io/depth-sensing/ TAG review - https://github.com/w3ctag/design-reviews/issues/550 Thanks, Piotr Bialecki

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Identifier Conversion Tooling
by Jonathan Bedard 12 Feb '21

12 Feb '21

Hello contributors, As we move forward with the transition to GitHub, we are starting to adopt identifiers <https://trac.webkit.org/wiki/commit-identifiers> in tooling and infrastructure. This is going to take a few weeks, but you will start seeing links based on identifiers more frequently. During this transition period, not all tooling will work with identifiers, and it’s possible there are tools you rely on that aren’t in common use so will be slow in receiving support. To that end, I would like to share the tools available to translate between hashes, revisions and identifiers in WebKit, along with the Python libraries backing that tooling if you feel motivated to expedite the transition for a workflow that is particularly important to you. Tools/Scripts/git-webkit find <ref> is the local script that can convert between revisions, hashes and identifiers. By default, it uses your local checkout, which means it may be restricted by your checkout’s configuration. For example, a pure Subversion checkout will be unable to convert hashes and a pure Git checkout will be unable to convert revisions, while a Git-Svn checkout will be able to translate all three formats. If you want to be certain that a hash or revision can be converted to an identifier, running Tools/Scripts/git-webkit -C https://svn.webkit.org/repository/webkit <https://svn.webkit.org/repository/webkit> find <ref> or Tools/Scripts/git-webkit -C https://github.com/WebKit/Webkit <https://github.com/WebKit/Webkit> find <ref> are options. These command operate entirely on the network, instead of relying on your local checkout. Both variations of git-webkit find are ultimately thin wrappers around webkitscmpy local.Scm and remote.Scm classes, so if you find yourself working with Python code, consider leveraging the APIs directly. Lastly, along with redirecting to trac/GitHub, the site https://commits.webkit.org <https://commits.webkit.org/> has a JSON API which vends a representation of a commit which includes the hash, revision and identifier and looks like this: https://commits.webkit.org/234036@main/json <https://commits.webkit.org/234036@main/json>. commits.webkit.org <http://commits.webkit.org/> is a service we are dedicated to maintaining permanently, since it allows us to vend commit links with identifiers instead of hashes. Jonathan WebKit Continuous Integration

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Request for position on mapping a source's width/height attributes to width/height/aspect-ratio CSS properties on the <img> in a <picture>
by Christian Biesinger 12 Feb '21

12 Feb '21

Hello webkit-dev, I would like to request an official position on the HTML spec change described in this pull request: https://github.com/whatwg/html/pull/5894/files Together with https://github.com/whatwg/html/pull/6032, this means that width/height attributes on a <source> element inside a <picture> will get mapped to CSS properties width/height/aspect-ratio on the <img> in the <picture>. Thanks, Christian

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