exceltoxlxstream = async function (file) { if (file) { const reader = new FileReader(); reader.onload = async function (e) { const data = new Uint8Array(e.target.result); const workbook = XLSX.read(data, { type: 'array' }); const fileStream = XLSX.write(workbook, { type: 'array', bookType: 'xlsx' }); return fileStream; }; reader.readAsArrayBuffer(file); } }