rollup.config.js

import esbuild from 'rollup-plugin-esbuild'
import { nodeResolve } from '@rollup/plugin-node-resolve'
import commonjs from '@rollup/plugin-commonjs'

const plugins = [
  commonjs(),
  nodeResolve(),
  esbuild({
    // All options are optional
    include: /\.[jt]sx?$/, // default, inferred from `loaders` option
    exclude: /node_modules/, // default
    sourceMap: true, // default
    minify: process.env.NODE_ENV === 'production',
    target: 'esnext', // default, or 'es20XX', 'esnext'
    jsx: 'transform', // default, or 'preserve'
    jsxFactory: 'React.createElement',
    jsxFragment: 'React.Fragment',
    // Like @rollup/plugin-replace
    define: {
      __VERSION__: '"x.y.z"'
    },
    tsconfig: 'tsconfig.json', // default
    // Add extra loaders
    loaders: {
      // Add .json files support
      // require @rollup/plugin-commonjs
      '.json': 'json',
      // Enable JSX in .js files too
      '.js': 'jsx'
    }
  })
]

export default [
  {
    plugins,
    input: './src/index.ts',
    output: {
      file: 'dist/monitor.js',
      format: 'esm',
      name: 'monitor',
      sourcemap: true
    }
  }
]