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dhtmlxgrid

## Undo|Redo Functionality

dhtmlxgrid_undo.js required

Extension allows undo|redo functionality. All edit actions made by user will be saved in unlimited undo history. However, modifications caused by API calls will not be stored in the history.

### Enabling/Disabling Undo|Redo

There are methods responsible for enabling/disabling undo|redo functionality in the grid:

            grid.enableUndoRedo();
            grid.disableUndoRedo();

### Executing Undo|Redo

The user can do undo|redo from script in the following way:

            grid.doUndo();
            grid.doRedo();

### Getting Undo|Redo

The following methods can be used to get length of available Undo|Redo operations in the grid:

         grid.getUndo().length;
         grid.getRedo().length;