Method constructor

lib/internal/worker.js:207–391

(filename, options = kEmptyObject)

class Worker extends EventEmitter {
  constructor(filename, options = kEmptyObject) {
    throwIfBuildingSnapshot('Creating workers');
    super();
    const isInternal = arguments[2] === kIsInternal;
    debug(
      `[${threadId}] create new worker`,
      filename,
      options,
      `isInternal: ${isInternal}`,
    );
    if (options.execArgv)
      validateArray(options.execArgv, 'options.execArgv');

    let argv;
    if (options.argv) {
      validateArray(options.argv, 'options.argv');
      argv = ArrayPrototypeMap(options.argv, String);
    }

    let url, doEval;
    if (isInternal) {
      doEval = 'internal';
      url = `node:${filename}`;
    } else if (options.eval) {
      if (typeof filename !== 'string') {
        throw new ERR_INVALID_ARG_VALUE(
          'options.eval',
          options.eval,
          'must be false when \'filename\' is not a string',
        );
      }
      url = null;
      doEval = 'classic';
    } else if (isURL(filename) && filename.protocol === 'data:') {
      url = null;
      doEval = 'data-url';
      filename = `${filename}`;
    } else {
      doEval = false;
      if (isURL(filename)) {
        url = filename;
        filename = fileURLToPath(filename);
      } else if (typeof filename !== 'string') {
        throw new ERR_INVALID_ARG_TYPE(
          'filename',
          ['string', 'URL'],
          filename,
        );
      } else if (path.isAbsolute(filename) ||
                 RegExpPrototypeExec(/^\.\.?[\\/]/, filename) !== null) {
        filename = path.resolve(filename);
        url = pathToFileURL(filename);
      } else {
        throw new ERR_WORKER_PATH(filename);
      }
    }

    let env;