vue export2Excel 怎么导出一个 excel 同时里面有两个 sheet？

如题，现在调用的是 js 里的 export_json_to_excel 这个方法，可以实现导出一个 excel 一个 sheet。

js 源码如下： /* eslint-disable */ import { saveAs } from 'file-saver'

import XLSX from 'xlsx'

// require('./Blob');

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 Value
        outRow.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);
console.log('a')
var oo = generateArray(theTable);
var ranges = oo[1];

/* original data */
var data = oo[0];
var ws_name = "SheetJS";
console.log(data);

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(th, jsonData, sheetName, defaultTitle) {

/* original data */

var data = jsonData;
data.unshift(th);
var ws_name = sheetName || 'sheet1';

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


/* 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'});
var title = defaultTitle || '列表'
saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), title + ".xlsx")

}