How to set a file name using window.open

Question

I\'am trying to download temporary result calculated by JavaScript. Say I have a string str, I want to download a file contains str and named it as

Answer 1

A solution for IE is to use msSaveBlob and pass the file name.

For modern browsers solution goes like this, tested: IE11, FF & Chrome

 var csvData = new Blob([arg.data], {type: 'text/csv;charset=utf-8;'});
        //IE11 & Edge
        if (navigator.msSaveBlob) {
            navigator.msSaveBlob(csvData, exportFilename);
        } else {
            //In FF link must be added to DOM to be clicked
            var link = document.createElement('a');
            link.href = window.URL.createObjectURL(csvData);
            link.setAttribute('download', exportFilename);
            document.body.appendChild(link);    
            link.click();
            document.body.removeChild(link);    
        }

There is a good discution about that here