如何在body中获取xlsx表的数据？

<script src="https://unpkg.com/xlsx/dist/xlsx.full.min.js"></script>

<input type="file" id="xlsxFileInput" />

document.getElementById('xlsxFileInput').addEventListener('change', function(e) {
  var file = e.target.files[0];
  var reader = new FileReader();

  reader.onload = function(e) {
    var data = new Uint8Array(e.target.result);
    var workbook = XLSX.read(data, { type: 'array' });
    var sheetName = workbook.SheetNames[0];
    var worksheet = workbook.Sheets[sheetName];
    var jsonData = XLSX.utils.sheet_to_json(worksheet, { header: 1 });

    console.log(jsonData);
  };

  reader.readAsArrayBuffer(file);
});