rollup.config.js

import babel from 'rollup-plugin-babel';
import commonjs from 'rollup-plugin-commonjs';
import external from 'rollup-plugin-peer-deps-external';
import resolve from 'rollup-plugin-node-resolve';
import url from 'rollup-plugin-url';
import json from 'rollup-plugin-json';

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,
    },
  ],
  external: ['axios'],
  plugins: [
    external(),
    url(),
    babel({
      exclude: 'node_modules/**',
      plugins: ['external-helpers'],
    }),
    resolve(),
    commonjs(),
    process.env.NODE_ENV === 'development' &&
      json({
        include: 'node_modules/**',
        preferConst: true,
        indent: '  ',
        compact: true,
      }),
  ],
};