Bug 229804

Summary:	Remove (DOM Style L2) CSSValue/CSSPrimitiveValue/CSSValueList
Product:	WebKit	Reporter:	Sam Sneddon [:gsnedders] <gsnedders>
Component:	CSS	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	karlcow, koivisto, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Local Build
Hardware:	Unspecified
OS:	Unspecified
Bug Depends on:	229912
Bug Blocks:

Description Sam Sneddon [:gsnedders] 2021-09-02 06:41:43 PDT

These were never supported in IE/Edge, and were dropped in Chrome 40 (2015-01-21) and Firefox 62 (2018-09-05). As such, since 2018 we've been the only browser engine to support these.

While in some ways this has been supplanted by CSS Typed OM (see Bug 175733), Firefox nevertheless dropped support without adding support for CSS Typed OM, hence I don't think it makes sense to be the outlier and the only browser supporting these APIs.

Comment 1 Sam Sneddon [:gsnedders] 2021-09-02 08:25:25 PDT

Others have informed that some applications make use of these APIs (including via WK1), as such we're probably (at least in the short-term) limited to putting these behind a flag.

Comment 2 Radar WebKit Bug Importer 2021-09-09 06:42:16 PDT

<rdar://problem/82922468>

Comment 3 Sam Sneddon [:gsnedders] 2021-12-13 06:49:21 PST

At least currently, CSSPrimitiveValue is used by fingerprint.js to detect WebKit: https://github.com/fingerprintjs/fingerprintjs/blob/09d11794dfc8da0365983bdbe638b78e2977cfd4/src/utils/browser.ts#L77

Comment 4 Sam Sneddon [:gsnedders] 2022-09-07 15:36:53 PDT

*** Bug 244906 has been marked as a duplicate of this bug. ***