ie11 Downloading Base64 documents

Question

I have tried pretty much everything at this point and I cannot get anything to work in ie.

I need ie to download base64 documents from an attachment panel. I have n

Answer 1

var data = item;
var fileName = name;
if (window.navigator && window.navigator.msSaveOrOpenBlob) { // IE 
workaround
var byteCharacters = atob(data);
var byteNumbers = new Array(byteCharacters.length);
for (var i = 0; i < byteCharacters.length; i++) {
    byteNumbers[i] = byteCharacters.charCodeAt(i);
}
var byteArray = new Uint8Array(byteNumbers);
var blob = new Blob([byteArray], {type: 'application/octet-stream'});
window.navigator.msSaveOrOpenBlob(blob, fileName);
}
else if( agent.indexOf('firefox') > -1)
{
console.log(extention,'item111')
var byteCharacters = atob(data);
var byteNumbers = new Array(byteCharacters.length);
for (var i = 0; i < byteCharacters.length; i++) {
  byteNumbers[i] = byteCharacters.charCodeAt(i);
 }
 var byteArray = new Uint8Array(byteNumbers);
//var FileSaver = require('file-saver');
 var blob = new Blob([byteArray], {type: "application/octet-stream"});
 saveAs(blob, fileName);
  }
 else{
  this.fileDownload='data:application/octet-stream;base64,'+item;
   var link = document.createElement("a");
   const fileName=name;
   link.href = this.fileDownload;
   link.download=fileName;
   link.click();
  }
  }