vite preview polish

Author: huseeiin

packages/start/src/config/dev-server.ts

@@ -15,9 +15,15 @@ export function devServer(): Array<PluginOption> {
         return () => {
           server.middlewares.use(async (req, res) => {
             const webReq = new NodeRequest({ req, res });
+            const { default: packageJSON } = await import(process.cwd() + "/package.json", {
+              with: { type: "json" },
+            });
             const def: {
               default: { fetch: (req: Request) => Promise<Response> };
-            } = await import(process.cwd() + "/dist/server/entry-server.js");
+            } = await import(
+              process.cwd() +
+                `/dist/server/entry-server.${packageJSON.type === "module" ? "js" : "mjs"}`
+            );
             const webRes = await def.default.fetch(webReq);
             if (webRes.headers.get("content-type")?.startsWith("text/html")) {
               res.setHeader("content-encoding", "identity");