Keep up the good work! Feedback: - delete (document) doesn't seem to work - change history would be good, potentially so I can revert a change if I change my

Keep up the good work! Feedback: - delete (document) doesn't seem to work - change history would be good, potentially so I can revert a change if I change my mind later - the app is clean, intuitive and responsive. I'd love to know a bit more about which JS framework you used, etc.