如何在JavaScript或jQuery中从xls/xlsx获取报头？

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

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

document.getElementById('fileInput').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 headers = [];

    for (var key in worksheet) {
      if (key[0] === '!') continue;
      if (key[1] === '1') {
        headers.push(worksheet[key].v);
      }
    }

    console.log(headers);
  };

  reader.readAsArrayBuffer(file);
});