Update c3.min.js

c3.js

@@ -616,7 +616,7 @@
             });
         }
 
-        if (duration) {
+        if (duration && $$.isTabVisible()) { // Only use transition if tab visible. See #938.
             // transition should be derived from one transition
             d3.transition().duration(duration).each(function () {
                 var transitionsToWait = [];
@@ -957,6 +957,21 @@
         return parsedDate;
     };
 
+    c3_chart_internal_fn.isTabVisible = function () {
+        var hidden;
+        if (typeof document.hidden !== "undefined") { // Opera 12.10 and Firefox 18 and later support
+            hidden = "hidden";
+        } else if (typeof document.mozHidden !== "undefined") {
+            hidden = "mozHidden";
+        } else if (typeof document.msHidden !== "undefined") {
+            hidden = "msHidden";
+        } else if (typeof document.webkitHidden !== "undefined") {
+            hidden = "webkitHidden";
+        }
+
+        return document[hidden] ? false : true;
+    };
+
     c3_chart_internal_fn.getDefaultConfig = function () {
         var config = {
             bindto: '#chart',