rollup.config.js

import resolve from "@rollup/plugin-node-resolve";
import commonjs from "@rollup/plugin-commonjs";
import alias from "@rollup/plugin-alias";
import strip from "@rollup/plugin-strip";

import babel from "rollup-plugin-babel";
import typescript from "rollup-plugin-typescript2";

import { eslint } from "rollup-plugin-eslint";
import { terser } from "rollup-plugin-terser";

import pkg from "./package.json";

const extensions = [".mjs", ".js", ".ts", ".tsx", ".json"];

const isProduction = process.env.NODE_ENV === "production";

const config = {
  input: "src",
  output: [
    {
      file: "dist/common.js",
      format: "cjs",
      sourcemap: true,
    },
    {
      file: "dist/index.js",
      format: "esm",
      sourcemap: true,
    },
  ],
  external: [
    ...Object.keys(pkg.dependencies || {}),
    ...Object.keys(pkg.peerDependencies || {}),
  ],
  plugins: [
    alias({
      entries: { "~": "./src" },
      resolve: extensions,
    }),
    eslint(),
    typescript({ rollupCommonJSResolveHack: true, clean: true }),
    babel({
      extensions,
      exclude: "node_modules/**",
    }),
    resolve({ extensions }),
    isProduction && strip(),
    commonjs(),
    isProduction && terser(),
  ],
};

export default config;