Wijmo's CollectionView class can keep track of changes made to the data. This feature is useful in situations where you must submit changes to the server. To turn on change tracking, set the trackChanges property to true. Once you do that, the CollectionView keeps track of any changes made to the data and exposes them in three arrays:
This feature is demonstrated below using a FlexGrid. The grid is bound to a CollectionView with trackChanges set to true. As you edit the grid, the changes are shown in three grids below.