| Version | Comments |
|---|---|
| Version 1 | Initial version |
| Version 2 | Doesn't allow to remove more items than the current inventory |
| Version 3 | Better SQL code |
| Version 4 | Style and formatting improvements |
| Version 5 | Using AJAX code |
| Version 6 | Validating form values with JavaScript |
| Version 7 | Improving the user experience |
| Version 8 | Using two AJAX requests (user experience and data update) |