move savelink in body of fileSaver

Author: timelyportfolio

src/snapshot/filesaver.js

@@ -16,11 +16,10 @@ License: https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md
 
 'use strict';
 
-var saveLink = document.createElementNS('http://www.w3.org/1999/xhtml', 'a');
-var canUseSaveLink = 'download' in saveLink;
-var isSafari = /Version\/[\d\.]+.*Safari/.test(navigator.userAgent);
-
 var fileSaver = function(url, name) {
+    var saveLink = document.createElement('a');
+    var canUseSaveLink = 'download' in saveLink;
+    var isSafari = /Version\/[\d\.]+.*Safari/.test(navigator.userAgent);  
     var promise = new Promise(function(resolve, reject) {
         // IE <10 is explicitly unsupported
         if(typeof navigator !== 'undefined' && /MSIE [1-9]\./.test(navigator.userAgent)) {