Express and other major Node.js HTTP libraries should work out of the box. Bun implements the node:http and node:https modules that these libraries rely on.
Refer to the Runtime > Node.js APIs page for more detailed compatibility information.
bun add expressTo define a simple HTTP route and start a server with Express:
server.ts
import express from "express";
const app = express();
const port = 8080;
app.get("/", (req, res) => {
res.send("Hello World!");
});
app.listen(port, () => {
console.log(`Listening on port ${port}...`);
});
To start the server on localhost:
bun server.ts