rollup.config.js

import babel from 'rollup-plugin-babel';
import typescript from 'rollup-plugin-typescript2';
import pkg from './package.json';

const tsconfig = {
  compilerOptions: {
    target: 'es6',
    module: 'es6',
    moduleResolution: 'node',
    noImplicitAny: true,
    removeComments: true,
    preserveConstEnums: true,
    outDir: './dist',
    declaration: true,
    declarationDir: './dist/types',
    sourceMap: false,
    esModuleInterop: true,
    lib: ['es6', 'dom'],
  },
  include: ['src/**/*.ts'],
  exclude: ['node_modules', '**/*.spec.ts'],
};

export default [
  {
    /* es5 */ input: 'src/index.ts',
    output: { file: pkg.browser, name: 'TA', format: 'iife' },
    plugins: [
      typescript({
        tsconfigOverride: tsconfig,
        useTsconfigDeclarationDir: true,
      }),
      babel({ exclude: 'node_modules/**' }),
    ],
  },

  {
    /* es6/esm */ input: 'src/index.ts',
    output: [
      { file: pkg.main, name: 'TA', format: 'umd' },
      { file: pkg.module, format: 'esm', sourcemap: 'inline' },
    ],
    plugins: [typescript({ tsconfigOverride: tsconfig })],
  },

  {
    /* temp4test */ input: 'src/core.ts',
    output: { file: 'temp/core.js', format: 'esm', sourcemap: 'inline' },
    plugins: [typescript({ tsconfigOverride: tsconfig })],
  },
];