...This example computes expression underneath using mathjs. On an invalid expression, the cell changes color to show the error. Note that react-datasheet does not handle the validation nor the formula computation. Custom renderers allow you to add significant new capabilities to your sheets without requiring changes to react-datagrid itself. This example allows you to reorder both the columns and the rows using drag and drop. This is implemented by using custom components to render the main table (including a custom header) and each row. ...