function importarDados(event) { const file = event.target.files[0]; const reader = new FileReader(); reader.onload = function(e) { const data = new Uint8Array(e.target.result); const workbook = XLSX.read(data, {type: 'array'}); const firstSheetName = workbook.SheetNames[0]; const worksheet = workbook.Sheets[firstSheetName]; const json = XLSX.utils.sheet_to_json(worksheet, {header: 1}); console.log(json); alert('Dados importados com sucesso!'); }; reader.readAsArrayBuffer(file); }