(next) - allow subsequent statically generated pages to hydrate the s…

…sr-cache (#1602)

* allow subsequent statically generated pages to hydrate the ssr-cache

* remove testing code

.changeset/witty-spiders-matter.md

@@ -0,0 +1,5 @@
+---
+'next-urql': minor
+---
+
+Allow subsequent static-pages to hydrate the cache

examples/with-next/package.json

@@ -11,6 +11,7 @@
     "urql": "^2.0.2"
   },
   "scripts": {
+    "dev": "next dev",
     "start": "next",
     "build": "next build"
   }

packages/next-urql/src/with-urql-client.ts

@@ -55,6 +55,8 @@ export function withUrqlClient(
         if (!ssr || typeof window === 'undefined') {
           // We want to force the cache to hydrate, we do this by setting the isClient flag to true
           ssr = ssrExchange({ initialState: urqlServerState, isClient: true });
+        } else if (ssr && typeof window !== 'undefined') {
+          ssr.restoreData(urqlServerState);
         }
 
         const clientConfig = getClientConfig(ssr);