about:blank#blocked error when export table in excel

user_5292301 0
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Javascript code table to excel data 

<script type="text/javascript">
var tableToExcel = (function () {
    var uri = 'data:application/vnd.ms-excel;base64,'
      , template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"><head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--><meta http-equiv="content-type" content="text/plain; charset=UTF-8"/></head><body><table>{table}</table></body></html>'
      , 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 (table, name,action) {

        if (!table.nodeType) table = document.getElementById(table)
        var ctx = { worksheet: name || 'Worksheet', table: table.innerHTML }
        window.location.href = uri + base64(format(template, ctx))
    }
})();
</script>

Action Button 

 <input type="button" class="btn btn-success" value="Export" onclick="tableToExcel('tblConsolidate','Report','Fifth Batch')" />

table design

<table class="table table-bordered" id="tblConsolidate">
<thead>
 <tr>
  <th>
   Head 1
 </th>
 <th>
   Head 2
 </th>
 </tr>
</thead>
<tbody style="text-align:center;">
  <tr>
  <td>
    body 1
 </td>
   <td>
    body 2
 </td>
 </tr>
 </tbody>

Question

when above table export to excel function worked good for small data but when rows above 800 rows and columns almost 20 or more then it showed about:blank#blocked error and export failed

what is the problem why this blocked and what should be change in my code ?

export-to-excel export-to-csv jquery javascript
2 Answers

I had the same issue, I solved it by saving it as a blob.

I believe the issue was caused by hitting the data URL data limit (2 mb on chrome?), by storing it as a blob increases your data limit by a lot (2 gigs?).

This answer was pretty helpful: [https://stackoverflow.com/a/36502388][1]

var tableToExcel = (function () {

        var myBlob =  new Blob( [table.innerHTML] , {type:'application/vnd.ms-excel'});
        var url = window.URL.createObjectURL(myBlob);
        var a = document.createElement("a");
        document.body.appendChild(a);
        a.href = url;
        a.download = "export.xls";
        a.click();
      //adding some delay in removing the dynamically created link solved the problem in FireFox
        setTimeout(function() {window.URL.revokeObjectURL(url);},0);

});

user_68764090

I solved it using this code

var tableToExcel = (function () {
  var encabezado = '<html><head><meta http-equiv="content-type" 
  content="text/plain; charset=UTF-8"/><style> table, td {border:thin solid 
  black} table {border-collapse:collapse}</style></head><body><table>';

  var dataTable = table.innerHTML
  var piePagina = "</table></body></html>";
  var tabla = encabezado + dataTable + piePagina;
  var myBlob =  new Blob( [tabla] , {type:'text/html'});
  var url = window.URL.createObjectURL(myBlob);
  var a = document.createElement("a");
  document.body.appendChild(a);
  a.href = url;
  a.download = "export.xls";
  a.click();
  
  setTimeout(function() {window.URL.revokeObjectURL(url);},0);
});
user_195050050
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