Fix handling of option ssr:false to work like not setting ssr option at all

Author: jmurty

index.js

@@ -24,6 +24,6 @@ export function useStore(store, { keys, deps = [store, keys], ssr } = {}) {
   return useSyncExternalStore(
     subscribe,
     get,
-    ssr === true ? () => store.init : (ssr ?? get)
+    ssr === true ? () => store.init : ssr || get
   )
 }

package.json

@@ -92,7 +92,7 @@
         "index.js": "{ useStore }",
         "nanostores": "{ map, computed }"
       },
-      "limit": "939 B"
+      "limit": "940 B"
     }
   ]
 }

test/index.test.ts

@@ -261,7 +261,11 @@ test('support for SSR does not break server behaviour in non-SSR projects', () =
   let mapValues: Value[] = [] // Track values used across renders
 
   let MapTest: FC = () => {
-    let value = useStore(mapStore).value
+    let value = useStore(
+      mapStore,
+      // Setting `ssr:false` should be equivalent to not setting `ssr` at all
+      { ssr: false }
+    ).value
     mapValues.push(value)
     return h('div', { 'data-testid': 'map-test' }, value)
   }