rollup.config.js

const resolve = require('@rollup/plugin-node-resolve');
const commonjs = require('@rollup/plugin-commonjs');
const typescript = require('@rollup/plugin-typescript');
const terser = require('@rollup/plugin-terser');

module.exports = [
  {
    input: 'src/index.ts',
    output: {
      file: 'dist/main.umd.js',
      format: 'umd',
      name: 'GameGrid',
      sourcemap: true,
    },
    plugins: [resolve(), commonjs(), typescript(), terser()],
  },
  {
    input: 'src/index.ts',
    output: {
      file: 'dist/main.js',
      format: 'esm',
      name: 'GameGrid',
      sourcemap: true,
    },
    plugins: [
      resolve(),
      commonjs(),
      typescript({
        declaration: true,
        rootDir: 'src/',
        exclude: ['**/*.spec.ts'],
      }),
      terser(),
    ],
  },
];