Fix: Small bugs

eustia/evalCss.js

@@ -1,5 +1,13 @@
+let mark = [];
+
 function exports(css)
 {
+    for (let i = 0, len = mark.length; i < len; i++)
+    {
+        if (mark[i] === css) return;
+    }
+    mark.push(css);
+
     var container = exports.container || document.head,
         style = document.createElement('style');