rollup.config.js

import resolve from '@rollup/plugin-node-resolve';
import babel from '@rollup/plugin-babel';
import commonjs from '@rollup/plugin-commonjs';
import { uglify } from 'rollup-plugin-uglify';
import replace from '@rollup/plugin-replace';

const env = process.env.NODE_ENV;

const config = {
  input: 'src/index.js',
  external: ['chart.js', 'react'],
  output: {
    name: 'ReactChartjs2',
    format: 'umd',
    globals: {
        'chart.js': 'Chart',
        react: 'React'
      },
      exports: 'named',
  },
  plugins: [
    resolve(),
    babel({
      babelHelpers: 'bundled',
      exclude: '**/node_modules/**',
    }),
    commonjs(),
  ],
};


if (env === 'production') {
   config.plugins.push(
    uglify({
      compress: {
        pure_getters: true,
        unsafe: true,
        unsafe_comps: true,
      },
      warnings: false
    })
  );

  config.plugins.push(
    replace({
      'process.env.NODE_ENV': JSON.stringify( 'production' )
    })
  )
}

export default config;