rollup.config.js

import peerDepsExternal from 'rollup-plugin-peer-deps-external';
import resolve from '@rollup/plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';
import { terser } from 'rollup-plugin-terser';
import typescript from 'rollup-plugin-typescript2';
import * as packageJson from './package.json';

export default {
  input: 'src/index.ts',
  output: [
    {
      file: packageJson.main,
      format: 'cjs',
      sourcemap: true,
    },
    {
      file: packageJson.module,
      format: 'esm',
      sourcemap: true,
    },
  ],
  plugins: [
    peerDepsExternal(),
    resolve(),
    commonjs(),
    typescript({ useTsconfigDeclarationDir: true }),

    // eslint-disable-next-line no-undef
    process.env.BUILD_MODE !== 'dev' &&
      terser({
        output: { comments: false },
        compress: {
          drop_console: true,
        },
      }),
  ],
};