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npm i file-saver xlsx -S
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A method to encapsulate an export

exportExcel(tableInfo, header, Val, filename) {
    import('@/vendor/Export2Excel').then((excel) = > {
      const tHeader = header / / head
      const filterVal = Val / / value
      const data = this.formatJson(filterVal, tableInfo)
      excel.export_json_to_excel({
        header: tHeader,
        data,
        filename: filename,
      })
    })
  },
  formatJson(list, filterVal) {
    return list.map((v) = >
      filterVal.map((j) = > {
        // console.log(v[j])
        return v[j]
      })
    )
  },
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/* @/vendor/Export2Excel.js */
import { saveAs } from 'file-saver'
import XLSX from 'xlsx'

function generateArray(table) {
  var out = []
  var rows = table.querySelectorAll('tr')
  var ranges = []
  for (var R = 0; R < rows.length; ++R) {
    var outRow = []
    var row = rows[R]
    var columns = row.querySelectorAll('td')
    for (var C = 0; C < columns.length; ++C) {
      var cell = columns[C]
      var colspan = cell.getAttribute('colspan')
      var rowspan = cell.getAttribute('rowspan')
      var cellValue = cell.innerText
      if(cellValue ! = =' ' && cellValue == +cellValue) cellValue = +cellValue

      //Skip ranges
      ranges.forEach(function (range) {
        if (
          R >= range.s.r &&
          R <= range.e.r &&
          outRow.length >= range.s.c &&
          outRow.length <= range.e.c
        ) {
          for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null)}})//Handle Row Span
      if (rowspan || colspan) {
        rowspan = rowspan || 1
        colspan = colspan || 1
        ranges.push({
          s: {
            r: R,
            c: outRow.length,
          },
          e: {
            r: R + rowspan - 1.c: outRow.length + colspan - 1,}})}//Handle ValueoutRow.push(cellValue ! = =' ' ? cellValue : null)

      //Handle Colspan
      if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null)
    }
    out.push(outRow)
  }
  return [out, ranges]
}

function datenum(v, date1904) {
  if (date1904) v += 1462
  var epoch = Date.parse(v)
  return (epoch - new Date(Date.UTC(1899.11.30)))/(24 * 60 * 60 * 1000)}function sheet_from_array_of_arrays(data, opts) {
  var ws = {}
  var range = {
    s: {
      c: 10000000.r: 10000000,},e: {
      c: 0.r: 0,}}for (var R = 0; R ! = data.length; ++R) {for (var C = 0; C ! = data[R].length; ++C) {if (range.s.r > R) range.s.r = R
      if (range.s.c > C) range.s.c = C
      if (range.e.r < R) range.e.r = R
      if (range.e.c < C) range.e.c = C
      var cell = {
        v: data[R][C],
      }
      if (cell.v == null) continue
      var cell_ref = XLSX.utils.encode_cell({
        c: C,
        r: R,
      })

      if (typeof cell.v === 'number') cell.t = 'n'
      else if (typeof cell.v === 'boolean') cell.t = 'b'
      else if (cell.v instanceof Date) {
        cell.t = 'n'
        cell.z = XLSX.SSF._table[14]
        cell.v = datenum(cell.v)
      } else cell.t = 's'

      ws[cell_ref] = cell
    }
  }
  if (range.s.c < 10000000) ws['! ref'] = XLSX.utils.encode_range(range)
  return ws
}

function Workbook() {
  if(! (this instanceof Workbook)) return new Workbook()
  this.SheetNames = []
  this.Sheets = {}
}

function s2ab(s) {
  var buf = new ArrayBuffer(s.length)
  var view = new Uint8Array(buf)
  for (var i = 0; i ! = s.length; ++i) view[i] = s.charCodeAt(i) &0xff
  return buf
}

export function export_table_to_excel(id) {
  var theTable = document.getElementById(id)
  var oo = generateArray(theTable)
  var ranges = oo[1]

  /* original data */
  var data = oo[0]
  var ws_name = 'SheetJS'

  var wb = new Workbook(),
    ws = sheet_from_array_of_arrays(data)

  /* add ranges to worksheet */
  // ws['!cols'] = ['apple', 'banan'];
  ws['! merges'] = ranges

  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name)
  wb.Sheets[ws_name] = ws

  var wbout = XLSX.write(wb, {
    bookType: 'xlsx'.bookSST: false.type: 'binary',
  })

  saveAs(
    new Blob([s2ab(wbout)], {
      type: 'application/octet-stream',}).'test.xlsx')}export function export_json_to_excel({
  multiHeader = [],
  header,
  data,
  filename,
  merges = [],
  autoWidth = true,
  bookType = 'xlsx'} = {},) {
  /* original data */
  filename = filename || 'excel-list'
  data = [...data]
  data.unshift(header)

  for (let i = multiHeader.length - 1; i > -1; i--) {
    data.unshift(multiHeader[i])
  }

  var ws_name = 'SheetJS'
  var wb = new Workbook(),
    ws = sheet_from_array_of_arrays(data)

  if (merges.length > 0) {
    if(! ws['! merges']) ws['! merges'] = []
    merges.forEach((item) = > {
      ws['! merges'].push(XLSX.utils.decode_range(item))
    })
  }

  if (autoWidth) {
    /* Sets the maximum width of each column of the worksheet */
    const colWidth = data.map((row) = >
      row.map((val) = > {
        /* Check whether the value is null/undefined*/
        if (val == null) {
          return {
            wch: 10,}}else if (val.toString().charCodeAt(0) > 255) {
        /* Check whether it is Chinese */
          return {
            wch: val.toString().length * 2,}}else {
          return {
            wch: val.toString().length,
          }
        }
      })
    )
    /* starts with the first behavior */
    let result = colWidth[0]
    for (let i = 1; i < colWidth.length; i++) {
      for (let j = 0; j < colWidth[i].length; j++) {
        if (result[j]['wch'] < colWidth[i][j]['wch']) {
          result[j]['wch'] = colWidth[i][j]['wch']
        }
      }
    }
    ws['! cols'] = result
  }

  /* add worksheet to workbook */
  wb.SheetNames.push(ws_name)
  wb.Sheets[ws_name] = ws

  var wbout = XLSX.write(wb, {
    bookType: bookType,
    bookSST: false.type: 'binary',
  })
  saveAs(
    new Blob([s2ab(wbout)], {
      type: 'application/octet-stream',}).`${filename}.${bookType}`)}Copy the code

Call the exportExcel method

let tableInfo = ['a'.'b'.'c']
let header = ['the first'.'2'.'3']
let val = [{ a: 'little red'.b: 'xiao LAN'.c: 'yellow' }]
let filename = 'Custom table'
this.utils.exportExcel(tableInfo, header, val, filename)
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The results of

Convert the data before invoking exportExcel