rollup.config.js

import babel from "rollup-plugin-babel";
import commonjs from "rollup-plugin-commonjs";
import external from "rollup-plugin-peer-deps-external";
import postcss from "rollup-plugin-postcss";
import resolve from "rollup-plugin-node-resolve";
import url from "rollup-plugin-url";
import svgr from "@svgr/rollup";
import gzipPlugin from "rollup-plugin-gzip";
import image from "rollup-plugin-image";
import pkg from "./package.json";

export default {
  input: "src/index.js",
  output: [
    {
      file: pkg.main,
      format: "cjs",
      sourcemap: true
    },
    {
      file: pkg.module,
      format: "es",
      sourcemap: true
    }
  ],
  plugins: [
    external(),
    postcss({
      modules: true
    }),
    url({
      limit: 0, // 0 => copy all files
      include: ["**/*.?(ttf|woff|woff2|png|jpg|svg|gif)"]
    }),
    svgr(),
    babel({
      exclude: "node_modules/**"
    }),
    resolve({ preferBuiltins: true }),
    commonjs({
      include: "node_modules/**",
      // left-hand side can be an absolute path, a path
      // relative to the current directory, or the name
      // of a module in node_modules
      namedExports: {
        "node_modules/react/index.js": [
          "cloneElement",
          "createContext",
          "Component",
          "createElement"
        ],
        "node_modules/react-dom/index.js": ["render", "hydrate"],
        "node_modules/react-is/index.js": [
          "isElement",
          "isValidElementType",
          "ForwardRef"
        ]
      }
    }),
    gzipPlugin(),
    image()
  ]
};