rollup.config.js

import typescript from 'rollup-plugin-typescript2'
import commonjs from 'rollup-plugin-commonjs'
import external from 'rollup-plugin-peer-deps-external'
import resolve from 'rollup-plugin-node-resolve'
import { terser } from 'rollup-plugin-terser'
import filesize from 'rollup-plugin-filesize'
import gzipPlugin from 'rollup-plugin-gzip'

import pkg from './package.json'

export default {
  input: 'lib/index.ts',
  output: [
    {
      file: pkg.main,
      format: 'cjs',
      sourcemap: true,
    },
    {
      file: pkg.module,
      format: 'es',
      sourcemap: true,
    },
  ],
  plugins: [
    external(),
    resolve(),
    typescript({
      typescript: require('typescript'),
      rollupCommonJSResolveHack: true,
      useTsconfigDeclarationDir: true,
      tsconfigOverride: {
        compilerOptions: {
          declarationDir: './typings',
          declarationMap: true,
        },
      },
      exclude: '**/tests/**',
      clean: true,
    }),
    commonjs({
      include: ['node_modules/**'],
    }),
    gzipPlugin(),
    filesize(),
    terser(),
  ],
}