Routar

Modern Node router.

Features:

• Easy to use, good performance
• Modern API, native Promise support, fully typed (TypeScript)
• Close compatibility with Express/Koa, fast migration
• Few dependencies (currently: 1), small API surface, easy to fully understand
• 100% code coverage, well tested

Usage

Install:

yarn add routar
# or
npm add routar

Setup your app:

const { Routar } = require("routar");

const port = process.env.PORT || 3000;
const app = new Routar();

app.get("/", (req, res) => {
  res.write("Hello world!");
});

app.listen(port).then(() => console.log(`Listening on ${port}`));

Full example

Routes

Routing in Routar is slightly different from other routes, but is targeted towards making it much simpler.

To start, you can use the .get, .post, .delete, .patch, .put, and .any (all aliasing to .route) to attach single routes to a router. These methods are chainable, and can be in any order (uses exact match):

app
  .get("/", (req, res) => {
    res.write("GET /");
  })
  .post("/submit", (req, res) => {
    res.write("POST /submit");
  })
  .get(
    "/catch",
    (req, res) => {
      res.write("GET /catch/*");
    },
    { exact: false }
  );

// Long form
app.route("POST", "/", (req, res) => {
  res.write("GET /");
});

app.any("/", (req, res) => {
  // Will catch all other methods on /
  res.write("DELETE/PUTCH/PUT /");
});

Child Routers

Child routers are useful to functionally split your application in smaller units:

app.child("/child").get("/", (req, res) => {
  res.write("GET /child");
});

// Or

const { Router } = require("routar");

const parentsRouter = new Router();

parentsRouter.get("/", (req, res) => {
  res.write("GET /parents");
});

app.child("/parents", parentsRouter);

Handler

A handler can be:

• A function ((res, res) => ...)
• A Promise (async (res, res) => ...)
• A router (new Router())
• A list of handlers ([middleware, (req, res) => ..., router])

Middlewares

Middlewares are triggered at the start and end of handing a router. A middleware is a handler that can return a function/Promise (to be called at the end of the request):

app
  .middleware((req, res) => {
    // Attaches data to the request in the root router
    req.data.name = "john";
  })
  .get("/", (req, res) => {
    res.json({ name: req.data.name });
  });

app
  .child("/child")
  .middleware((req, res) => {
    return () => {
      // Will append ' ... Smith!' to all requets in this router
      res.write(" ... Smith!");
    };
  })
  .get("/", (req, res) => {
    res.write(`My name is ${req.data.name}`);
  });

Listening

Using app.listen is a simple way to start your Routar server:

// Can parse port from string
app.listen(process.env.PORT || 3000);

// Will randomly assign port
app.listen();

// Returns a Promise with port and server
app.listen().then(async ({ port, server, close }) => {
  console.log(`Listening on :${port}`);
  console.log(`Max connections: ${server.maxConnections}`);

  // Wait 1s
  await new Promise(resolve => setTimeout(resolve, 1000));

  // Close server,
  await close();
});

To use in testing or in http.createServer, you can use app.handler:

const server = http.createServer(app.handler);

// Using supertest

request(app.handler);

Support

We support all currently active and maintained Node LTS versions, include current Node versions.

Please file feature requests and bugs at the issue tracker.