rollup.config.js

import typescript from "rollup-plugin-typescript2";
import babel from "@rollup/plugin-babel";
import pkg from "./package.json";

export default {
  input: "src/index.tsx",

  output: [
    { file: pkg.main, format: "cjs", exports: "named", sourcemap: true },
    { file: pkg.module, format: "es", sourcemap: true },
  ],

  plugins: [
    typescript({
      typescript: require("typescript"),
      clean: true,
      tsconfig: "./tsconfig.json",
      tsconfigOverride: {
        exclude: ["node_modules/**", "**/*.d.spec.ts", "**/*.spec.ts"],
      },
    }),

    babel({
      babelHelpers: "runtime",
      extensions: [".ts", ".tsx"],
      exclude: ["node_modules/**", /\.spec\./],
      presets: ["solid"],
      plugins: [
        "@babel/plugin-transform-runtime",
        "@babel/plugin-proposal-optional-chaining",
        "@babel/plugin-proposal-nullish-coalescing-operator",
      ],
    }),
  ],

  external: [/@babel\/runtime/, /solid-js/, /^router5/],
};