When save the grid to an Excel file by calling exportToExcel function, if specify GridExportOptions.applyDynamicStyles as true, you can export an Excel file in which have reflected dynamic styles set in the columns or rows.
DataLudi.exportToExcel(grid, {
target: "local",
fileName: "dlgrid.xlsx",
applyDynamicStyles: document.getElementById("chkApplyDynamics").checked
});
In addition, if specify GridExportOptions.styledText as true, it will be saved as the text in which has applied GridStyles.prefix, suffix or ValueColumn.displayCallback.