Windows Phone 8.1 supports History API, but Modernizr gives a false negative.

The check in question returns false for Android 4.0 (presumably because it reports as supporting API but in fact doesn't?). However, Microsoft recently started including Android in WP user agent, leading Modernizr to believe it's an Android when in fact it's not.

Example of failing Windows Phone UA: "Mozilla/5.0 (Mobile; Windows Phone 8.1; Android 4.0; ARM; Trident/7.0; Touch; rv:11.0; IEMobile/11.0; Microsoft; Virtual) like iPhone OS 7_0_3 Mac OS X AppleWebKit/537 (KHTML, like Gecko) Mobile Safari/537". As you see, it contains Android 4.0.

The fix is to add additional check for Windows Phone like I do here:

   if ((ua.indexOf('Android 2.') !== -1 ||
       (ua.indexOf('Android 4.0') !== -1)) &&
       ua.indexOf('Mobile Safari') !== -1 &&
-      ua.indexOf('Chrome') === -1) {
+      ua.indexOf('Chrome') === -1 &&
+      ua.indexOf('Windows Phone') === -1) {
     return false;
   }