exportExcelDataMultipleSheet

exportExcelData() {
    // Create a new Excel workbook
    const workbook = new ExcelJS.Workbook();

    // ... (Sheet creation logic for 'Index', 'Sheet 1', 'Sheet 2', 'Sheet 3')

    // Write the workbook to a buffer and initiate download
    workbook.xlsx.writeBuffer().then(buffer => {
        var link = document.createElement("a");
        link.href = 'data:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;base64,' + buffer.toString('base64');
        link.download = 'FullProfileDetails.xls';
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
    });

    // Show success message
    const evt = new ShowToastEvent({
        title: 'Download Successful',
        message: 'Multiple Sheet Data downloaded successfully',
        variant: 'success',
        mode: 'dismissable'
    });
    this.dispatchEvent(evt);
}