Having said that, it's using Material UI which has only just committed PRs to remove IE support in a yet to be released version, so this probably works with IE

Having said that, it's using Material UI which has only just committed PRs to remove IE support in a yet to be released version, so this probably works with IE even if the author doesn't intend to support it. Just an observation that the open source ecosystem has been very patient with Microsoft – no obligation on anyone to support anything that doesn't suit them!