fix(plugin-history-sync): add getServerSnapshot to useSyncExternalStore for SSR compatibility (#643)

orionmiz · claude · web-flow · commit 567352a9191d · 2025-10-23T12:43:40.000+09:00
Co-authored-by: Claude &lt;noreply@anthropic.com&gt;
diff --git a/.changeset/fix-ssr-getServerSnapshot.md b/.changeset/fix-ssr-getServerSnapshot.md
@@ -0,0 +1,5 @@
+---
+"@stackflow/plugin-history-sync": patch
+---
+
+Fix SSR compatibility by adding getServerSnapshot parameter to useSyncExternalStore. This resolves the "Missing getServerSnapshot, which is required for server-rendered content" error in SSR environments.
diff --git a/extensions/plugin-history-sync/src/historySyncPlugin.tsx b/extensions/plugin-history-sync/src/historySyncPlugin.tsx
@@ -175,6 +175,7 @@ export function historySyncPlugin<
         const activityActivationCounts = useSyncExternalStore(
           subscribeActivityActivationCountsChange,
           getActivityActivationCounts,
+          getActivityActivationCounts,
         );
 
         return (

-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +"@stackflow/plugin-history-sync": patch
 +---
++
 +Fix SSR compatibility by adding getServerSnapshot parameter to useSyncExternalStore. This resolves the "Missing getServerSnapshot, which is required for server-rendered content" error in SSR environments.