rollup.config.ts

import resolve from 'rollup-plugin-node-resolve'
import commonjs from 'rollup-plugin-commonjs'
import sourceMaps from 'rollup-plugin-sourcemaps'
import capitalize from 'lodash.capitalize'

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

const libraryName = 'noel';

export default {
    entry: `compiled/${libraryName}.js`,
    targets: [
        {dest: pkg.main, moduleName: capitalize(libraryName), format: 'umd'},
        {dest: pkg.module, format: 'es'},
    ],
    sourcemap: true,
    // Indicate here external modules you don't wanna include in your bundle (i.e.: 'lodash')
    external: [],
    watch: {
        include: 'compiled/**',
    },
    plugins: [
        // 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(),
    ],
}