fix: Populate ActiveStyleSheetTracker during page load for CSS live reload without HotSwap Agent (#23603) (CP: 25.0)#23635
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mcollovati merged 1 commit into25.0from Feb 23, 2026
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…eload without HotSwap Agent (#23603) ActiveStyleSheetTracker was only populated by StyleSheetHotswapper.onInit(), which requires a HotSwap Agent. Without one, the tracker stayed empty and PublicResourcesLiveUpdater's file watcher silently skipped all CSS updates. Register active @Stylesheet URLs during normal dev-mode page loading: - AppShellRegistry.createSettings() tracks AppShell stylesheets - UIInternals.addComponentDependencies() tracks component stylesheets Both paths are guarded by !isProductionMode() for zero production overhead. Also simplify the live reload integration test to rely on the file watcher instead of manually triggering reload via button clicks. Fixes #23592
caalador
approved these changes
Feb 23, 2026
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ActiveStyleSheetTracker was only populated by StyleSheetHotswapper.onInit(), which requires a HotSwap Agent. Without one, the tracker stayed empty and PublicResourcesLiveUpdater's file watcher silently skipped all CSS updates.
Register active @Stylesheet URLs during normal dev-mode page loading:
Both paths are guarded by !isProductionMode() for zero production overhead.
Also simplify the live reload integration test to rely on the file watcher instead of manually triggering reload via button clicks.
Fixes #23592