React95/rollup.config.js

import babel from "rollup-plugin-babel";
import commonjs from "rollup-plugin-commonjs";
import resolve from "rollup-plugin-node-resolve";
import replace from "rollup-plugin-replace";

const NODE_ENV = process.env.NODE_ENV || "development";
const outputFile =
  NODE_ENV === "production" ? "./dist/prod.js" : "./dist/dev.js";

export default {
  input: "./src/components/index.js",
  output: {
    file: outputFile,
    format: "cjs"
  },
  plugins: [
    replace({
      "process.env.NODE_ENV": JSON.stringify(NODE_ENV)
    }),
    babel({
      exclude: "node_modules/**"
    }),
    resolve(),
    commonjs()
  ],
  external: id => /^react|react-dom|styled-components/.test(id)
};