rollup.config.js

import resolve from "@rollup/plugin-node-resolve";
import babel from "@rollup/plugin-babel";
import pkg from "./package.json";

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

const name = pkg.name;

export default {
	input: "./src/index.ts",
	// Specify here external modules which you don't want to include in your bundle (for instance: 'lodash', 'moment' etc.)
	// https://rollupjs.org/guide/en#external-e-external
	external: ["oasis-engine"],

	plugins: [
		// Allows node_modules resolution
		resolve({ extensions }),

		// Compile TypeScript/JavaScript files
		babel({
			babelHelpers: "bundled",
			presets: [
				[
					"@babel/preset-env",
					{
						loose: true,
						targets: ">0.3%, not dead",
						bugfixes: true,
					},
				],
				"@babel/preset-typescript",
			],
			extensions,
			include: ["src/**/*"],
			plugins: [
				["@babel/plugin-proposal-decorators", { legacy: true }],
				["@babel/plugin-proposal-class-properties", { loose: true }],
				"@babel/plugin-proposal-optional-chaining",
			],
		}),
	],

	output: [
		{
			file: pkg.module,
			format: "es",
		},
		{
			file: pkg.browser,
			format: "umd",
			name,
			globals: {
				"oasis-engine": "oasisEngine",
			},
		},
	],
};