Bug 289800

Summary: -webkit-backdrop-filter ignores css variables
Product: WebKit Reporter: krabodyan
Component: CSSAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Trivial CC: koivisto, ntim, simon.fraser, webkit-bug-importer, webkit, zalan
Priority: P2 Keywords: InRadar
Version: Other   
Hardware: PC   
OS: Linux   
See Also: https://bugs.webkit.org/show_bug.cgi?id=263834
https://bugs.webkit.org/show_bug.cgi?id=289149
https://bugs.webkit.org/show_bug.cgi?id=297620

krabodyan
Reported 2025-03-14 10:34:47 PDT
--blur-size: 8px; --blur: blur(var(--blur-size)); -webkit-filter: var(--blur); /* works */ -webkit-filter: blur(var(--blur-size)); /* works */ -webkit-backdrop-filter: blur(8px); /* works */ -webkit-backdrop-filter: var(--blur); /* dont work */ -webkit-backdrop-filter: blur(var(--blur-size)); /* dont work */ in devtools -webkit-backdrop-filter is marked as applied and the value of variables is displayed, but there is no blur effect itself. -webkit-filter works properly with the same variables. Chromium, FIrefox, etc does not have this problem. Bug persist in Tauri 2.0 app built with webkitgtk_4_1 version 2.46.6 from nixos unstable Same app built on windows does not have this bug
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Radar WebKit Bug Importer
Comment 1 2025-03-21 10:35:34 PDT
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