Function err

test/parallel/test-eventtarget.js:323–328

(arg)

  });

  const err = (arg) => ({
    code: 'ERR_INVALID_ARG_TYPE',
    name: 'TypeError',
    message: 'The "listener" argument must be an instance of EventListener.' +
             common.invalidArgTypeHelper(arg),
  });

  [
    'foo',