Bug 259013

Summary:	[CSS Math Functions] Implement use-time handling of relative units
Product:	WebKit	Reporter:	Tim Nguyen (:ntim) <ntim>
Component:	CSS	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
URL:	https://wpt.fyi/results/css/css-values/signs-abs-computed.html?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&view=interop&q=label%3Ainterop-2023-mathfunctions

Description Tim Nguyen (:ntim) 2023-07-08 03:17:11 PDT

sign(10px - 1em) should return 0 if font-size is 10px, right now it returns 1px, which is incorrect.

See failures in https://wpt.fyi/results/css/css-values/signs-abs-computed.html?label=master&label=experimental&product=chrome&product=firefox&product=safari&aligned&view=interop&q=label%3Ainterop-2023-mathfunctions

Comment 1 Radar WebKit Bug Importer 2023-07-08 03:17:20 PDT

<rdar://problem/111949502>

Comment 2 Tim Nguyen (:ntim) 2023-07-08 03:17:58 PDT

ditto for sign(10px - 2em), that should be -1 with font-size 10px.

Comment 3 Tim Nguyen (:ntim) 2023-07-08 13:11:16 PDT

round/mod/rem have similar failures with percentage lengths