rollup.config.ts

import resolve from '@rollup/plugin-node-resolve';
import typescript from 'rollup-plugin-typescript2';
import json from '@rollup/plugin-json';
import terser from '@rollup/plugin-terser';

const pkg = require('./package.json');

const libraryName = 'jmespath';

export default {
  input: `src/index.ts`,
  output: [
    { file: pkg.main, name: libraryName, format: 'umd', exports: 'named', sourcemap: false },
    { file: pkg.main.replace('umd.js', 'umd.min.js'), name: libraryName, format: 'umd', exports: 'named', sourcemap: true, plugins: [terser()] },
    { file: pkg.module, format: 'esm', exports: 'named', sourcemap: false },
    { file: pkg.module.replace('esm.js', 'esm.min.js'), format: 'esm', exports: 'named', sourcemap: true, plugins: [terser()] },
  ],
  // Indicate here external modules you don't wanna include in your bundle (i.e.: 'lodash')
  external: [],
  watch: {
    include: ['src/**'],
  },
  plugins: [
    // Allow json resolution
    json(),
    // Compile TypeScript files
    typescript({
      tsconfig: './tsconfig.json',
      useTsconfigDeclarationDir: true
    }),
    // Allow node_modules resolution, so you can use 'external' to control
    // which external modules to include in the bundle
    // https://github.com/rollup/rollup-plugin-node-resolve#usage
    resolve()
  ]
}