rollup.config.js

import { nodeResolve } from '@rollup/plugin-node-resolve';
import ignore from "rollup-plugin-ignore";
import commonjs from '@rollup/plugin-commonjs';
import typescript from 'rollup-plugin-typescript2'

export default {
    input: 'src/index.ts',
    output: [
        {
            file: 'lib/index.js',
            exports: 'named',
            format: 'es',
            sourcemap: true,
            globals: {'ws': 'ws',
                      'perf_hooks': 'perf_hooks'}
        }
    ],
    plugins: [
        ignore(["fs", "path", "crypto"]),
        nodeResolve({ browser: true }),
        commonjs({
            ignoreDynamicRequires: true,
        }),
        typescript({
            rollupCommonJSResolveHack: false,
            clean: true
        })
    ]
};