How to convert html table to excel with multiple sheet?

Question

How can I convert multiple html tables to an excel sheet with multiple worksheets? Could you please help into this.

My example https://jsfiddle.net/kdkd/5p22gdag/

Answer 1

Bhutani Vijay's code works perfectly fine. For IE 11 compatibility I used the Blob object as below:

var tablesToExcel = (function() {
  var uri = 'data:application/vnd.ms-excel;base64,',
    tmplWorkbookXML = '' +
    'Axel Richter{created}' +
    '' +
    '' +
    '' +
    '' +
    '{worksheets}',
    tmplWorksheetXML = '{rows}',
    tmplCellXML = '{data}',
    base64 = function(s) {
      return window.btoa(unescape(encodeURIComponent(s)))
    },
    format = function(s, c) {
      return s.replace(/{(\w+)}/g, function(m, p) {
        return c[p];
      })
    }
  return function(tables, wsnames, wbname, appname) {
    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]);
      for (var j = 0; j < tables[i].rows.length; j++) {
        rowsXML += ''
        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 += ''
      }
      ctx = {
        rows: rowsXML,
        nameWS: wsnames[i] || 'Sheet' + i
      };
      worksheetsXML += format(tmplWorksheetXML, ctx);
      rowsXML = "";
    }

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

    var link = document.createElement("A");
    
    // IE 11
    if (window.navigator.msSaveBlob) {
      var blob = new Blob([workbookXML], {
        type: "application/csv;charset=utf-8;"
      });
      navigator.msSaveBlob(blob, 'test.xls');
    }
    // Chrome and other browsers
    else {
      link.href = uri + base64(workbookXML);
    }

    link.download = wbname || 'Workbook.xls';
    link.target = '_blank';
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
  }
})();