feat: support useSession ssr for nuxt (#209)

docs/content/docs/integrations/nuxt.mdx

@@ -35,20 +35,20 @@ Create a client instance. You can name the file anything you want. Here we are c
 ```ts title="client.ts"
 import { createAuthClient } from "better-auth/vue" // make sure to import from better-auth/vue
 
-export const client = createAuthClient({
+export const authClient = createAuthClient({
     //you can pass client configuration here
 })
 ```
 
 Once you have created the client, you can use it to sign up, sign in, and perform other actions.
-Some of the actinos are reactive. The client use [nano-store](https://github.com/nanostores/nanostores) to store the state and re-render the components when the state changes.
+Some of the actinos are reactive.
 
 ### Example usage
 
 ```vue title="index.vue"
 <script setup lang="ts">
-import { client } from "~/lib/client"
-const session = client.useSession()
+import { authClient } from "~/lib/client"
+const session = authClient.useSession()
 </script>
 
 <template>
@@ -67,3 +67,21 @@ const session = client.useSession()
     </div>
 </template>
 ```
+
+### SSR Usage
+
+If you are using Nuxt with SSR, you can use the `useSession` function in the `setup` function of your page component and pass `useFetch` to make it work with SSR.
+
+```vue title="index.vue"
+<script setup lang="ts">
+import { authClient } from "~/lib/auth-clietn";
+
+const { data: session } = authClient.useSession(useFetch);
+</script>
+
+<template>
+    <p>
+        {{ session }}
+    </p>
+</template>
+```

examples/nuxt-example/lib/auth-client.ts

@@ -1,6 +1,6 @@
 import { createAuthClient } from "better-auth/vue";
 
-export const client = createAuthClient({
+export const authClient = createAuthClient({
 	baseURL: "http://localhost:3000",
 });
 
@@ -11,4 +11,4 @@ export const {
 	useSession,
 	forgetPassword,
 	resetPassword,
-} = client;
+} = authClient;

examples/nuxt-example/pages/dashboard.vue

@@ -1,7 +1,6 @@
 <script setup lang="ts">
 import { useSession, signOut } from "~/lib/auth-client";
-const session = useSession();
-const router = useRouter();
+const { data: session, isPending, error } = await useSession(useFetch);
 </script>
 
 
@@ -16,15 +15,15 @@ const router = useRouter();
             <CardContent>
                 <div class="flex gap-2 items-center">
                     <Avatar>
-                        <AvatarImage :src="session.data?.user.image || ''" alt="User profile" />
-                        <AvatarFallback>{{ session.data?.user.name[0] }}</AvatarFallback>
+                        <AvatarImage :src="session?.user.image || ''" alt="User profile" />
+                        <AvatarFallback>{{ session?.user.name[0] }}</AvatarFallback>
                     </Avatar>
                     <div>
                         <p class="text-sm">
-                            {{ session.data?.user?.name }}
+                            {{ session?.user?.name }}
                         </p>
                         <p class="text-xs">
-                            {{ session.data?.user?.email }}
+                            {{ session?.user?.email }}
                         </p>
                     </div>
                 </div>
@@ -32,7 +31,7 @@ const router = useRouter();
             <CardFooter>
                 <Button @click="async () => {
                     await signOut()
-                    router.push('/')
+                    // router.push('/')
                 }" variant="secondary">
                     Sing Out
                 </Button>

examples/nuxt-example/pages/index.vue

@@ -17,7 +17,7 @@ const features = [
 	"Rate Limiting",
 	"Session Management",
 ];
-const session = useSession();
+const { data: session } = await useSession(useFetch);
 </script>
 
 <template>
@@ -39,6 +39,7 @@ const session = useSession();
                     features and capabilities. <br />
                 </p>
 
+
                 <div class="flex flex-col gap-3 pt-2 flex-wrap">
                     <div class="border-y py-2 border-dotted bg-secondary/60 opacity-80">
                         <div class="text-xs flex items-center gap-2 justify-center text-muted-foreground">
@@ -58,12 +59,12 @@ const session = useSession();
                     </div>
                 </div>
                 <div class="flex items-center gap-2 mt-2 mx-auto">
-                    <NuxtLink to="/sign-in" v-if="!session.data">
+                    <NuxtLink to="/sign-in" v-if="!session">
                         <Button variant="outline" class="rounded-none">
                             Sign In
                         </Button>
                     </NuxtLink>
-                    <NuxtLink to="/dashboard" v-if="session.data">
+                    <NuxtLink to="/dashboard" v-if="session">
                         <Button variant="outline" class="rounded-none">
                             Dashboard
                         </Button>

package.json

@@ -13,7 +13,7 @@
         "lint": "biome check .",
         "lint:fix": "biome check . --apply",
         "release": "turbo --filter \"./packages/*\" build && bumpp && pnpm -r publish --access public --no-git-checks",
-        "release:beta": "turbo --filter \"./packages/*\" build && bumpp && pnpm -r publish --access public --tag beta --no-git-checks",
+        "release:beta": "turbo --filter \"./packages/*\" build && bumpp && pnpm -r publish --access public --tag next --no-git-checks",
         "test": "turbo --filter \"./packages/*\" test",
         "typecheck": "turbo --filter \"./packages/*\" typecheck"
     },

packages/better-auth/src/client/vue.ts

@@ -53,9 +53,43 @@ export function createAuthClient<Option extends ClientOptions>(
 	}
 	const { $session, _sessionSignal, $Infer } = getSessionAtom<Option>($fetch);
 
-	function useSession() {
+	type Session = ReturnType<typeof $session.get>["data"];
+
+	function useStoreSession() {
 		return useStore($session);
 	}
+
+	function useSession(): ReturnType<typeof useStoreSession>;
+	function useSession<F extends (...args: any) => any>(
+		useFetch: F,
+	): Promise<{
+		data: Ref<Session>;
+		isPending: false; //this is just to be consistent with the default hook
+		error: Ref<{
+			message?: string;
+			status: number;
+			statusText: string;
+		}>;
+	}>;
+	function useSession<UseFetch extends <T>(...args: any) => any>(
+		useFetch?: UseFetch,
+	) {
+		if (useFetch) {
+			const ref = useStore(_sessionSignal);
+			const session = useFetch("/api/auth/session", {
+				ref,
+			}).then((res: any) => {
+				return {
+					data: res.data,
+					isPending: false,
+					error: res.error,
+				};
+			});
+			return session;
+		}
+		return useStoreSession();
+	}
+
 	const routes = {
 		...pluginsActions,
 		...resolvedHooks,