Spreadsheet functionality can be easily achieved with smartGrid. In this demo, the Grid operates in Unbound mode, allowing you to set cell and row values, styles, as well as rowspan and colspan during initialization. Features such as row and column resizing are enabled for flexible layout adjustments. Selection and editing behave similarly to Excel, providing a familiar user experience. Additionally, you can add new sheets using the tab interface, and each sheet can have its own independent grid configuration. The demo also supports keyboard navigation, copy-paste operations, and custom cell formatting to further enhance productivity and usability.