Ajax blob save as.. file download

saveas.js

var url = 'http://www.pdf995.com/samples/pdf.pdf';
var fileName = 'pdf.pdf';
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.responseType = 'blob';
 
xhr.onprogress = function(pe) {
  console.log('progress');
  if (pe.lengthComputable) {
    console.log((pe.loaded / pe.total) * 100);
  }	
};
 
xhr.onload = function(e) {
  if (this.status == 200) {
    var blob = this.response;
    //TODO fallback needed for IE8 & IE9
    if (navigator.appVersion.toString().indexOf('.NET') > 0) {
    	//IE 10+
    	window.navigator.msSaveBlob(blob, fileName);
    } else {
    	//Firefox, Chrome
    	var a = document.createElement("a");
    	var blobUrl = window.URL.createObjectURL(new Blob([blob], {type: blob.type}));
      document.body.appendChild(a);
      a.style = "display: none";
      a.href = blobUrl;
      a.download = fileName ;
      a.click();
    }
  }
};
 
xhr.send();