How to make the regular in google apps script in spreadsheets replace not the first match found, but all?

Question

Regular Expressions

I know about the global flag, but it doesn't work for some reason. Maybe I'm doing something wrong...

function myFunction() {
  phone="097-888-88-88";
  phone = phone.replace('-', '', 'g')
  Logger.log(phone);
}

UDP
worked like this

var regex = new RegExp('-', 'g');
phone = phone.replace(regex, '', 'g');

Answer 1

phone = phone.replace(/-/g, '');