Catching an exception on Send. This happens when request for HEAD ret…

dist/FileSaver.js

@@ -30,7 +30,7 @@
     if (typeof opts === 'undefined') opts = {
       autoBom: false
     };else if (typeof opts !== 'object') {
-      console.warn('Depricated: Expected third argument to be a object');
+      console.warn('Deprecated: Expected third argument to be a object');
       opts = {
         autoBom: !opts
       };
@@ -66,7 +66,13 @@
     var xhr = new XMLHttpRequest(); // use sync to avoid popup blocker
 
     xhr.open('HEAD', url, false);
-    xhr.send();
+
+    try {
+      xhr.send();
+    } catch (e) {
+      return false;
+    }
+
     return xhr.status >= 200 && xhr.status <= 299;
   } // `a.click()` doesn't work for all browsers (#465)
 
@@ -135,7 +141,7 @@
   } // Fallback to using FileReader and a popup
   : function saveAs(blob, name, opts, popup) {
     // Open a popup immediately do go around popup blocker
-    // Mostly only avalible on user interaction and the fileReader is async so...
+    // Mostly only available on user interaction and the fileReader is async so...
     popup = popup || open('', '_blank');
 
     if (popup) {
@@ -150,7 +156,7 @@
     var isChromeIOS = /CriOS\/[\d]+/.test(navigator.userAgent);
 
     if ((isChromeIOS || force && isSafari) && typeof FileReader === 'object') {
-      // Safari doesn't allow downloading of blob urls
+      // Safari doesn't allow downloading of blob URLs
       var reader = new FileReader();
 
       reader.onloadend = function () {