首先，你应该把file作为一个二进制字符串来读取，所以你必须这样做

function readFile(file) {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = (e) => {
      resolve(e.target.result);
    };
    reader.onerror = (e) => {
      reject(e);
    };
    reader.readAsBinaryString(file);
  });
}

然后，您应该将此二进制字符串解析为一个工作簿：

async function readExcel() {
  // Wait for the binary string first
  const binaryString = await readFile(ExportReportCardTemplate);

  const wb = xlsx.read(binaryString, { type: 'binary' });
  // use the wb here
}