js realizes the export of excel contains multiple sheets (realizes the export of multiple tables)

Realize the effect
For example, there are two tables in the page, and they need to be exported to excel

<table id='table1'>
	<tr>
		<td>员工编号</td>
		<td>实发工资</td>
		<td>员工姓名</td>
		<td>应发工资</td>
		<td>应扣工资</td>
		<td>单位</td>
		<td>民族</td>
		<td>固定工资</td>
		<td>政治面貌</td>
		<td>绩效工资</td>
	<tr>
	<tr>
		<td>JGH20031095</td>
		<td>1020.00</td>
		<td>11</td>
		<td>1200.00</td>
		<td>200</td>
		<td>JJJ</td>
		<td>汉族</td>
		<td>10000.00</td>
		<td>中国共产党党员</td>
		<td>0.00</td>
	<tr>
</table>

<table id='table2'>
	<tr>
		<td>绩效工资</td>
		<td>身份证件号</td>
		<td>籍贯</td>
		<td>职务</td>
		<td>岗位性质</td>
		<td>婚宴状况</td>
		<td>岗位</td>
		<td>岗位类别</td>
		<td>性别</td>
		<td>出生日期</td>
	<tr>
	<tr>
		<td>0</td>
		<td>0</td>
		<td>湖南浏阳</td>
		<td>副院长</td>
		<td>在编</td>
		<td>未婚</td>
		<td>专任教师</td>
		<td>专业技术岗</td>
		<td>男</td>
		<td>1963-05-13</td>
	<tr>
</table>

js part

function export(){
    
    
	//示例  有多少个table就生成多少个sheet 数组相同
	var tables = ['table1','table2'];
	var sheets = ['sheet0','sheet1'];
	var fileName = '测试导出文件.xls';//文件名
	tablesToExcel(tables,sheets,fileName,'Excel');
}

//导出excel包含多个sheet
//tables:tableId的数组;wsbames:sheet的名字数组;wbname:工作簿名字;appname:Excel
function tablesToExcel(tables, wsnames, wbname, appname) {
    
    

    var uri = 'data:application/vnd.ms-excel;base64,'
        ,
        tmplWorkbookXML = '<?xml version="1.0"?><?mso-application progid="Excel.Sheet"?><Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet">'
            + '<DocumentProperties xmlns="urn:schemas-microsoft-com:office:office"><Author>Axel Richter</Author><Created>{created}</Created></DocumentProperties>'
            + '<Styles>'
            + '<Style ss:ID="Currency"><NumberFormat ss:Format="Currency"></NumberFormat></Style>'
            + '<Style ss:ID="Date"><NumberFormat ss:Format="Medium Date"></NumberFormat></Style>'
            + '</Styles>'
            + '{worksheets}</Workbook>'
        , tmplWorksheetXML = '<Worksheet ss:Name="{nameWS}"><Table>{rows}</Table></Worksheet>'
        , tmplCellXML = '<Cell{attributeStyleID}{attributeFormula}><Data ss:Type="{nameType}">{data}</Data></Cell>'
        , base64 = function (s) {
    
    
            return window.btoa(unescape(encodeURIComponent(s)))
        }
        , format = function (s, c) {
    
    
            return s.replace(/{(\w+)}/g, function (m, p) {
    
    
                return c[p];
            })
        }

    var ctx = "";
    var workbookXML = "";
    var worksheetsXML = "";
    var rowsXML = "";

    for (var i = 0; i < tables.length; i++) {
    
    
        if (!tables[i].nodeType) tables[i] = document.getElementById(tables[i]);

        //控制要导出的行数
        for (var j = 0; j < tables[i].rows.length; j++) {
    
    
            rowsXML += '<Row>';

            for (var k = 0; k < tables[i].rows[j].cells.length; k++) {
    
    
                var dataType = tables[i].rows[j].cells[k].getAttribute("data-type");
                var dataStyle = tables[i].rows[j].cells[k].getAttribute("data-style");
                var dataValue = tables[i].rows[j].cells[k].getAttribute("data-value");
                dataValue = (dataValue) ? dataValue : tables[i].rows[j].cells[k].innerHTML;
                var dataFormula = tables[i].rows[j].cells[k].getAttribute("data-formula");
                dataFormula = (dataFormula) ? dataFormula : (appname == 'Calc' && dataType == 'DateTime') ? dataValue : null;
                ctx = {
    
    
                    attributeStyleID: (dataStyle == 'Currency' || dataStyle == 'Date') ? ' ss:StyleID="' + dataStyle + '"' : ''
                    ,
                    nameType: (dataType == 'Number' || dataType == 'DateTime' || dataType == 'Boolean' || dataType == 'Error') ? dataType : 'String'
                    ,
                    data: (dataFormula) ? '' : dataValue
                    ,
                    attributeFormula: (dataFormula) ? ' ss:Formula="' + dataFormula + '"' : ''
                };
                rowsXML += format(tmplCellXML, ctx);
            }
            rowsXML += '</Row>'
        }
        ctx = {
    
    rows: rowsXML, nameWS: wsnames[i] || 'Sheet' + i};
        worksheetsXML += format(tmplWorksheetXML, ctx);
        rowsXML = "";
    }

    ctx = {
    
    created: (new Date()).getTime(), worksheets: worksheetsXML};
    workbookXML = format(tmplWorkbookXML, ctx);

//       查看后台的打印输出
//     console.log(workbookXML);

    var link = document.createElement("A");
    link.href = uri + base64(workbookXML);
    link.download = wbname || 'Workbook.xls';
    link.target = '_blank';
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);

}