babel/example-node-server

$ npm install --save-dev @babel/cli @babel/core @babel/preset-env

$ touch .babelrc

{
  "presets": ["@babel/preset-env"]
}

$ touch index.js

import http from 'http';

const server = http.createServer((req, res) => {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(1337, '127.0.0.1');

console.log('Server running at http://127.0.0.1:1337/');

export default server;

  "scripts": {
+   "build": "babel index.js -d dist"
  }

  "scripts": {
   "build": "babel index.js -d dist",
+   "start": "npm run build && node dist/index.js"
  }

$ npm start

$ npm install --save-dev nodemon

  "scripts": {
    "build": "babel index.js -d dist",
-   "start": "npm run build && node dist/index.js"
+   "start": "npm run build && nodemon dist/index.js"
  }

$ npm start

$ mkdir lib
$ mv index.js lib/index.js

  "scripts": {
-   "build": "babel index.js -d dist",
+   "build": "babel lib -d dist",
    "start": "npm run build && nodemon dist/index.js"
  }

  "scripts": {
    "build": "babel lib -d dist",
    "start": "npm run build && nodemon dist/index.js",
+   "serve": "node dist/index.js"
  }

$ npm run build
$ npm run serve

$ touch .gitignore

dist

$ npm install --save-dev mocha

$ mkdir test
$ touch test/index.js

import http from 'http';
import assert from 'assert';

import server from '../lib/index.js';

describe('Example Node Server', () => {
  it('should return 200', done => {
    http.get('http://127.0.0.1:1337', res => {
      assert.equal(200, res.statusCode);
      server.close();
      done();
    });
  });
});

$ npm install --save-dev @babel/register

  "scripts": {
    "start": "nodemon lib/index.js --exec babel-node",
    "build": "babel lib -d dist",
    "serve": "node dist/index.js",
+   "test": "mocha --require @babel/register"
  }

$ npm test

Server running at http://127.0.0.1:1337/

  Example Node Server
    ✓ should return 200

  1 passing (43ms)