From a4c5b7abda963b2cb96211b6c612c088d0e003d4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=86ndrew=20Rininsland?= <aendrew@aendrew.com>
Date: Sat, 24 Jan 2015 22:31:24 +0000
Subject: [PATCH] Added c3_chart_internal_fn.isTabVisible to disable
 transitions on inactive tabs. Fixes #924.

---
 src/core.js | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/core.js b/src/core.js
index 68ed6fa..234f3c8 100644
--- a/src/core.js
+++ b/src/core.js
@@ -611,7 +611,7 @@ c3_chart_internal_fn.redraw = function (options, transitions) {
         });
     }
 
-    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 = [];
@@ -948,3 +948,18 @@ c3_chart_internal_fn.parseDate = function (date) {
     }
     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;
+};