rollup.config.js

import babel from "@rollup/plugin-babel";
import commonjs from "@rollup/plugin-commonjs";
import resolve from "@rollup/plugin-node-resolve";
import run from "@rollup/plugin-run";
import { terser } from "rollup-plugin-terser";

const extensions = [".js", ".ts"];

/** @type {import('rollup').RollupOptions} */
const config = {
    input: "src/index.ts",
    output: {
        dir: "dist",
        format: "es",
        name: "TSEngine",
        entryFileNames: "[name].js",
        chunkFileNames: "[name].[hash].js",
    },

    plugins: [
        resolve({ extensions }),
        commonjs(),
        babel({
            extensions,
            babelHelpers: "bundled",
            include: ["src/**/*"],
        }),
    ],
};

const isDevelopment = process.env.NODE_ENV !== "production";

if (isDevelopment) {
    config.watch = {};
    config.output.sourcemap = true;
    config.plugins = [...config.plugins, run()];
}

if (!isDevelopment) {
    config.output.sourcemap = false;
    config.plugins = [...config.plugins, terser({})];
}

export default config;