Better GET signature

.changeset/popular-mirrors-train.md

@@ -0,0 +1,5 @@
+---
+"@solidjs/start": patch
+---
+
+better GET signature

examples/experiments/src/routes/index.tsx

@@ -4,16 +4,16 @@ import { clientOnly, GET } from "@solidjs/start";
 import Counter from "~/components/Counter";
 const BreaksOnServer = clientOnly(() => import("~/components/BreaksOnServer"));
 
-async function hello(name: string) {
+const hello = GET(async (name: string) => {
   "use server";
   return json(
     { hello: new Promise<string>(r => setTimeout(() => r(name), 1000)) },
     { headers: { "cache-control": "max-age=60" } }
   );
-}
+});
 
 export default function Home() {
-  GET(hello, "John").then(async v => {
+  hello("John").then(async v => {
     console.log(v);
     console.log(await v.hello);
   });

packages/start/config/server-runtime.jsx

@@ -177,6 +177,7 @@ async function fetchServerFunction(base, id, method, args) {
 
 export function createServerReference(fn, id, name) {
   const baseURL = import.meta.env.SERVER_BASE_URL;
+  if (typeof fn !== "function") throw new Error("Export from a 'use server' module must be a function");
   return new Proxy(fn, {
     get(target, prop, receiver) {
       if (prop === "url") {

packages/start/shared/GET.ts

@@ -1,3 +1,5 @@
-export function GET<T extends (...args: any[]) => any>(fn: T, ...args: Parameters<T>) {
-  return (fn as any).GET(...args) as ReturnType<T>;
+export function GET<T extends (...args: any[]) => any>(fn: T) {
+  return (...args: Parameters<T>) => {
+    return (fn as any).GET(...args) as ReturnType<T>;
+  };
 }