NodeJS and ES6

Bable can transpile ES6 code to JS code that can be processed by Node.

Folder and file structure:

Here is package.json

{
  "name": "node-server-using-es6",
  "version": "1.0.0",
  "description": "Node Server compiles code to ES6 using babel",
  "main": "lib/index.js",
  "scripts": {
    "build": "rimraf build && babel src -d dist",
    "start": "nodemon --exec babel-node src/index",
    "prod": "npm run build && node dist/index.js"
  },
  "license": "ISC",
  "devDependencies": {
    "@babel/cli": "^7.2.3",
    "@babel/core": "^7.4.0",
    "@babel/node": "^7.18.10",
    "@babel/preset-env": "^7.4.2",
    "@babel/register": "^7.4.0",
    "nodemon": "^1.17.5"
    "rimraf": "^3.0.2"
  },
  "dependencies": {
    "express": "^4.18.1"
  }
}

Here is .babelrc

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

Here is src/index.js in ES6

import express from 'express';
const app = express();
const PORT = 4000;

app.get('/', (req, res) => {
  res.send('Hello World!');
});

app.listen(4000, () => {
  console.log(`app is running on ${PORT}`);
});

for production npm run build this will populate build folder

for development npm start