| add() | adds a new item to the component |
| changeId() | changes the id of an element of a data collection |
| copy() | creates a copy of an item at the defined position |
| exists() | checks whether the specified item exists in the component |
| filter() | filters data items in a component |
| find() | finds the item that corresponds to the specified rule |
| findAll() | finds all the items that correspond to the specified rule |
| forEach() | iterates over all items of a data collection |
| getId() | returns the id of the item by its index |
| getIndex() | returns the index of the item by its id |
| getInitialData() | returns the initial values of the items of a widget initialized in a data collection |
| getItem() | returns the object of an item by its id |
| getLength() | returns the number of all elements of a data collection |
| isDataLoaded() | checks whether the specified data range is loaded from the server |
| isSaved() | checks whether the changes made in a data collection are saved |
| load() | loads data from an external file |
| map() | iterates through all items of the component |
| mapRange() | returns a new array of the items correspond to the specified parameters |
| move() | moves an item to the defined position |
| parse() | loads data from a local data source |
| reduce() | reduces the array to a single value |
| remove() | deletes the specified item from the component |
| removeAll() | deletes all items from the component |
| save() | saves changes made in a data collection to the server side |
| serialize() | serializes the component data into JSON, XML or CSV format |
| sort() | sorts data items in a component |
| update() | updates properties of the item |