Added module entry point

.babelrc

@@ -1,16 +1 @@
{
  "presets": [
    [
      "env",
      {
        "loose": true,
        "targets": {
          "browsers": ["last 1 version"]
        }
      }
    ],
    "flow",
    "react"
  ],
  "plugins": ["transform-class-properties"]
}
{ "presets": ["./.babelrc.js"] }

.babelrc.js

@@ -0,0 +1,23 @@
const { BABEL_ENV, NODE_ENV } = process.env;
const cjs = BABEL_ENV === 'cjs' || NODE_ENV === 'test';

module.exports = {
  presets: [
    [
      'env',
      {
        modules: false,
        loose: true,
        targets: {
          browsers: ['last 1 version']
        }
      }
    ],
    'flow',
    'react'
  ],
  plugins: [
    'transform-class-properties',
    cjs && 'transform-es2015-modules-commonjs'
  ].filter(Boolean)
};

package.json

@@ -3,13 +3,15 @@
  "version": "1.0.1",
  "description": "State ain't shit",
  "main": "lib/unstated.js",
  "module": "lib/unstated.es.js",
  "repository": "https://github.com/thejameskyle/unstated",
  "author": "James Kyle <me@thejameskyle.com>",
  "license": "MIT",
  "files": ["lib"],
  "scripts": {
    "clean": "rm -rf lib",
    "build": "babel src -Dd lib && flow-copy-source src lib",
    "build":
      "rollup -c && flow-copy-source src lib && cp src/unstated.d.ts lib/unstated.d.ts",
    "typecheck": "flow",
    "test": "jest",
    "format": "prettier --write **/*.{js,json,md}",
@@ -24,7 +26,7 @@
    "react-dom": "^15.0.0 || ^16.0.0"
  },
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-core": "^6.26.0",
    "babel-plugin-transform-class-properties": "^6.24.1",
    "babel-preset-env": "^1.6.1",
    "babel-preset-flow": "^6.23.0",
@@ -42,7 +44,9 @@
    "prop-types": "^15.6.0",
    "react": "^16.2.0",
    "react-dom": "^16.2.0",
    "react-test-renderer": "^16.2.0"
    "react-test-renderer": "^16.2.0",
    "rollup": "^0.55.3",
    "rollup-plugin-babel": "^3.0.3"
  },
  "lint-staged": {
    "*.{js,json,md}": ["prettier --write", "git add"]

rollup.config.js

@@ -0,0 +1,21 @@
import babel from 'rollup-plugin-babel';
import pkg from './package.json';

export default {
  input: 'src/unstated.js',
  output: [
    {
      file: pkg.main,
      format: 'cjs'
    },
    {
      file: pkg.module,
      format: 'es'
    }
  ],
  external: [
    ...Object.keys(pkg.dependencies || {}),
    ...Object.keys(pkg.peerDependencies || {})
  ],
  plugins: [babel()]
};