Actualización

web/assets/modernizr/feature-detects/ie8compat.js

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+
+// IE8 compat mode aka Fake IE7
+// by Erich Ocean
+
+// In this case, IE8 will be acting as IE7. You may choose to remove features in this case.
+
+// related:
+// james.padolsey.com/javascript/detect-ie-in-js-using-conditional-comments/
+
+Modernizr.addTest('ie8compat',function(){
+    return (!window.addEventListener && document.documentMode && document.documentMode === 7);
+});