Hi WebKit-dev,
I'd like to ask for WebKit's official position on CSS Module Scripts, as
described in the explainer at [1]. This proposal allows developers to import a
CSSStyleSheet using the same import mechanism as JavaScript Modules:
import styleSheet from "./styles.css" assert { type: "css" };
The proposal has already been in discussion for a while now (long thread at
[2], see also the TAG review [3]), but I think it would be useful to have
WebKit's official position on it. Note that use of CSS modules will now require
a type: "css" import assertion [4] to prevent the MIME type security issue
raised at TPAC 2019 [5].
The CSS Module Script HTML Spec PR is at [6], and is currently blocked on
resolution of an open issue [7] in the import assertions TC39 proposal. However
import assertions is at Stage 3 so that proposal is unlikely to undergo
significant changes.
[1] Explainer:
https://github.com/WICG/webcomponents/blob/gh-pages/proposals/css-modules-v1-explainer.md
[2] Discussion Thread: https://github.com/WICG/webcomponents/issues/759
[3] TAG review: https://github.com/w3ctag/design-reviews/issues/405
[4] Import Assertions: https://github.com/tc39/proposal-import-assertions
[5] MIME type security issue: https://github.com/w3c/webcomponents/issues/839
[6] HTML Spec PR: https://github.com/w3ctag/design-reviews/issues/405
[7] Import Assertions host integration issue:
https://github.com/tc39/proposal-import-assertions/pull/111
Thanks,
Dan Clark
Microsoft Edge
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