rollup.config.js

import resolve from '@rollup/plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';
import typescript from '@rollup/plugin-typescript';
import alias from '@rollup/plugin-alias';
import { terser } from 'rollup-plugin-terser';
import path from 'path';

export default {
  input: 'src/index.ts',
  output: [
    {
      file: 'dist/index.js',
      format: 'umd',
      name: 'tsWebsocketClient',
      sourcemap: true,
    },
    {
      file: 'dist/index.min.js',
      format: 'umd',
      name: 'tsWebsocketClient',
      sourcemap: true,
      plugins: [terser()],
    },
    {
      file: 'dist/index.esm.js',
      format: 'es',
      sourcemap: true,
    },
    {
      file: 'dist/index.esm.min.js',
      format: 'es',
      sourcemap: true,
      plugins: [terser()],
    },
  ],
  plugins: [
    alias({
      entries: [{ find: '@', replacement: path.resolve(__dirname, 'src') }],
    }),
    resolve(),
    commonjs(),
    typescript({
      tsconfig: './tsconfig.json',
      declaration: true,
      declarationDir: 'dist',
      rootDir: 'src',
    }),
  ],
};