JavaScript for WordPress › Forums › Gutenberg Development › Getting an error in run dev › Reply To: Getting an error in run dev January 11, 2018 at 12:12 pm #37652 Zac GordonKeymaster This line right here should handle that. https://github.com/zgordon/gutenberg-course/blob/e5fa68af2eb6f5b1480e8361fde9ba18da67e12b/jsforwp-blocks/.babelrc#L11