How to use Event handlers?

[donywan]

// Create an app instance
export const app = createApp();

// Create a new router and register it in app
const router = createRouter();
app.use(router);

// Add a new route that matches GET requests to / path
router.get(
  "/",
  defineEventHandler((event) => {
    return { message: "⚡️ Tadaa!" };
  }),
);

And i use bun run dev,but not work.I don't like using Filesystem routing because the parameters received are complicated.How to use Event handlers? Is there a demo?

[donywan]

// Import h3 as npm dependency
import { createApp, createRouter, defineEventHandler, toWebHandler } from "h3";

// Create an app instance
const app = createApp();

// Create a new router and register it in app
const router = createRouter();
app.use(router);

// Add a new route that matches GET requests to / path
router.get(
  "/hello",
  defineEventHandler((event) => {
    return { message: "⚡️ Tadaa!" };
  }),
);

const server = Bun.serve({
  port: 3000,
  async fetch(request, server) {
    const handler = toWebHandler(app);
    return handler(request); // Ensure this matches the actual invocation needs.
  },
});

That is work now.But it not work when i use npm run build and npm run dev.