rollup.config.js

const fs = require("fs");
const path = require("path");
const { transpileModule } = require("typescript");
const tsconfig = require("./tsconfig.json");
const pkg = require("./package.json");

const resolve = {
  name: "resolve",
  resolveId(file, importer) {
    let tmp,
      { ext } = path.parse(file);
    if (ext) return file;

    let next = path.resolve(path.dirname(importer), file);
    if (fs.existsSync(next)) return next;

    if (fs.existsSync((tmp = next + ".ts"))) return tmp;
    if (fs.existsSync((tmp = next + ".js"))) return tmp;

    return null;
  },
};

const typescript = {
  name: "typescript",
  transform(code, file) {
    if (!/\.ts$/.test(file)) return code;
    // @ts-ignore
    let output = transpileModule(code, { ...tsconfig, fileName: file });
    return {
      code: output.outputText.replace("$$VERSION$$", pkg.version),
      map: output.sourceMapText || null,
    };
  },
};

module.exports = {
  input: "src/index.ts",
  output: {
    format: "cjs",
    file: "index.js",
    esModule: false,
    interop: true,
    strict: false,
    freeze: false,
  },
  external: [
    ...require("module").builtinModules,
    ...Object.keys(pkg.peerDependencies),
    "tailwindcss/lib/util/resolveConfig",
    "tailwindcss/lib/util/getAllConfigs",
  ],
  plugins: [resolve, typescript],
};