Create NPM module

.babelrc

{
  "presets": ["env"],
  "plugins": [
    "transform-object-rest-spread",
    "transform-react-jsx"
  ]
}

index.js

import React, { Component } from 'react';
import PropTypes from 'prop-types';

class MyReactModule extends Component {
  componentDidMount() {
    
  }

  render() {
    return (
      <div>
        MY REACT COMPONENT
      </div>
    );
  }
}

MyReactModule.defaultProps = {
  
}

MyReactModule.PropTypes = {
  
}

export default MyReactModule;

package.json

{
  "name": "my-npm-module",
  "version": "0.0.1",
  "description": "Simple React component",
  "main": "build/index.js",
  "dependencies": {
    
  },
  "devDependencies": {
    "prop-types": "^15.6.0",
    "react": "^15.5.4",
    "webpack": "^2.6.1",
    "babel-cli": "^6.24.1",
    "babel-core": "^6.24.1",
    "babel-loader": "^7.0.0",
    "babel-plugin-transform-object-rest-spread": "^6.23.0",
    "babel-plugin-transform-react-jsx": "^6.24.1",
    "babel-preset-env": "^1.5.1"
  },
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "webpack --watch",
    "build": "webpack"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/aliustaoglu/create-npm-module.git"
  },
  "keywords": [
    "react"
  ],
  "author": "Cuneyt Aliustaoglu",
  "license": "ISC",
  "bugs": {
    "url": "https://github.com/aliustaoglu/create-npm-module/issues"
  },
  "homepage": "https://github.com/aliustaoglu/create-npm-module#readme"
}

webpack.config.js

var path = require('path');
module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'index.js',
    libraryTarget: 'commonjs2'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        include: path.resolve(__dirname, 'src'),
        exclude: /(node_modules|bower_components|build)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['env']
          }
        }
      }
    ]
  },
  externals: {
    'react': 'commonjs react'
  }
};