This is an example of an editable datagrid where you can double-click a cell in the score column, change the contents and then press Enter and it will be saved to the browsers localStorage area. So you can refresh the page and your edits will still be there. Most commonly, you would send this information back to the server so that it can be saved more permanently. You can do that by employing the RGraph AJAX functions, for example the RGraph.AJAX.post function.
The score column has validation on it so you must enter a value below 1000 or the edit will be rejected and not saved. This is done using the beforeeditsave event.