Function loadCjsModule

src/esm.ts:353–478

(modulePath: string)

// biome-ignore lint/suspicious/noExplicitAny: This is actually loading a user space module that can be anything
function loadCjsModule(modulePath: string): any {
  const code = fs.readFileSync(modulePath, 'utf-8');
  const dirname = path.dirname(modulePath);
  const filename = modulePath;

  // Create a require function scoped to the module's directory
  const moduleRequire = createRequire(pathToFileURL(modulePath).href);

  // Create module and exports objects
  // biome-ignore lint/suspicious/noExplicitAny: This is actually loading a user space module that can be anything
  const moduleObj: { exports: any } = { exports: {} };

  // Create a context with CJS globals
  // We include all commonly used Node.js globals to ensure compatibility
  const context = vm.createContext({
    // CJS-specific globals
    module: moduleObj,
    exports: moduleObj.exports,
    require: moduleRequire,
    __dirname: dirname,
    __filename: filename,

    // Global object references (some CJS modules use these)
    global: globalThis,
    globalThis,

    // Console and process
    console,
    process,

    // Binary data
    Buffer,

    // Timers
    setTimeout,
    setInterval,
    setImmediate,
    clearTimeout,
    clearInterval,
    clearImmediate,
    queueMicrotask,

    // URL handling
    URL,
    URLSearchParams,

    // Text encoding/decoding
    TextEncoder,
    TextDecoder,
    atob: globalThis.atob,
    btoa: globalThis.btoa,

    // Fetch API (Node 18+)
    fetch: globalThis.fetch,
    Request: globalThis.Request,
    Response: globalThis.Response,
    Headers: globalThis.Headers,