I want to export data from table into excel file, but I want to add title and few blank rows before table. Also I want to do some css for that table.

This is my code in .ts file and it works but I want to style it a little bit. I didn't find anything for my problem, but also I'm beginner in this :)

exportExcel() : void { const ws: XLSX.WorkSheet =XLSX.utils.json_to_sheet(this.excelArray);

/* generate workbook and add the worksheet */
const wb: XLSX.WorkBook = XLSX.utils.book_new();
XLSX.utils.book_append_sheet(wb, ws, 'Sheet1');

/* save to file */  
XLSX.writeFile(wb, this.fileName);

}