js获取excel内容

import XLSX from "xlsx";

<input type="file" id="uploadFile" value="上传文件">

checkSheet() {
  const objFile = document.getElementById('uploadFile')
  if (objFile.value === '') {
    alert('请选择文件！')
    return
  }
  // 获取文件
  const files = objFile.files
  const _that = this

  const fileReader = new FileReader();
  fileReader.onload = function(ev) {
    console.log('ev: ', ev);
    const data = ev.target.result,
          workbook = XLSX.read(data, {
            type: 'binary'
          })
    let dataList = [];

    // 遍历每张表读取
    console.log('workbook: ', workbook);
    for (var sheet in workbook.Sheets) {
      if (workbook.Sheets.hasOwnProperty(sheet) && sheet === 'device') {
        dataList = dataList.concat(XLSX.utils.sheet_to_json(workbook.Sheets[sheet]));
        console.log('sheet: ', sheet);
      }
    }
    _that.analysisSheet(dataList)
  };

  fileReader.readAsBinaryString(files[0]);
},
analysisSheet(data) {
  console.log('data: ', data);
},