rollup.config.js

import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-sourcemaps';
import sourceMaps from 'rollup-plugin-sourcemaps';
import typescript from 'rollup-plugin-typescript2';
import json from 'rollup-plugin-json';

import pkg from './package.json'
export default {
    input: 'src/index.ts',
    output: [
        {
            file: pkg.main,
            format: 'cjs',
            sourcemap: true,
          },
    ],
    external: [
        ...Object.keys(pkg.dependencies || {}),
        ...Object.keys(pkg.peerDependencies || {}),
    ],
    plugins: [
        // Allow json resolution
        json(),

        typescript({
            useTsconfigDeclarationDir: true,
            objectHashIgnoreUnknownHack: false      
        }),
        // Allow bundling cjs modules (unlike webpack, rollup doesn't understand cjs)
        commonjs(),

        // 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(),

        // Resolve source maps to the original source
        sourceMaps(),
    ],
}