How to change the name of file while exporting data to Excel?

here is an example which demonstrates Export HTML Table to Excel With Custom File Name: http://www.kubilayerdogan.net/javascript-export-html-table-to-excel-with-custom-file-name/

Not only for excel, in addition, for many kind of format can useable.

 var element = document.createElement('a');
            element.setAttribute('href', 'data:application/vnd.ms-excel,' + encodeURIComponent(htmlTable));
            element.setAttribute('download', fileName);
            element.style.display = 'none';
            document.body.appendChild(element);
            element.click();
            document.body.removeChild(element);

https://ourcodeworld.com/articles/read/189/how-to-create-a-file-and-generate-a-download-with-javascript-in-the-browser-without-a-server

I had the same issue, and since the new format (maybe not supported by every browser) <a download=""></a> the following worked fine for me. This use directly HTML/Javascript without the PHP server part, because using a submit form is too heavy for big data tables.

• changing <button> to <a>
• no more window.open()
• using the basic <a> behavior (so, no more e.preventDefault()) but changing href to data:blabla and adding download="filename" :

<div id="example" class="k-content">
    <a href="#" id="btnExport" >Export to csv!</a>
    <div id="grid"></div>
</div>
<script>
    $("#btnExport").click(function (e) {
        var result = "data:application/vnd.ms-excel,";
        this.href = result;
        this.download = "my-custom-filename.xls";
        return true;
    });
</script>

You can't do this with client-side JavaScript, you need to set the response header...

.NET

Response.AddHeader("Content-Disposition", "inline;filename=filename.xls")

Or PHP

$filename = 'somehting.xls';

header('Content-Disposition: attachment; filename="'.$filename.'"');

Response.AddHeader "Content-Disposition", "attachment; filename=C:\YOURFILENAME.xls;"

var a = document.createElement('a');
//getting data from our div that contains the HTML table
var data_type = 'data:application/vnd.ms-excel';
a.href = data_type + ', ' + encodeURIComponent(tab_text);
//setting the file name
a.download = 'SupervisorReport.xls';
//triggering the function
a.click();
//just in case, prevent default behaviour
e.preventDefault();
return (a);