From ab8dbc214e7ea43fec65c4464b8db7392f3df905 Mon Sep 17 00:00:00 2001
From: Phil Hughes <theephil@gmail.com>
Date: Fri, 10 Oct 2014 15:50:00 +0100
Subject: Implement `hide` and `hidden` events for tabs

Closes #14772.
---
 js/tab.js | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

(limited to 'js/tab.js')

diff --git a/js/tab.js b/js/tab.js
index d7023c817..c597d7ab6 100644
--- a/js/tab.js
+++ b/js/tab.js
@@ -33,22 +33,30 @@
 
     if ($this.parent('li').hasClass('active')) return
 
-    var previous = $ul.find('.active:last a')[0]
-    var e        = $.Event('show.bs.tab', {
-      relatedTarget: previous
+    var $previous = $ul.find('.active:last a')
+    var hideEvent = $.Event('hide.bs.tab', {
+      relatedTarget: $this[0]
+    })
+    var showEvent = $.Event('show.bs.tab', {
+      relatedTarget: $previous[0]
     })
 
-    $this.trigger(e)
+    $previous.trigger(hideEvent)
+    $this.trigger(showEvent)
 
-    if (e.isDefaultPrevented()) return
+    if (showEvent.isDefaultPrevented() || hideEvent.isDefaultPrevented()) return
 
     var $target = $(selector)
 
     this.activate($this.closest('li'), $ul)
     this.activate($target, $target.parent(), function () {
+      $previous.trigger({
+        type: 'hidden.bs.tab',
+        relatedTarget: $this[0]
+      })
       $this.trigger({
         type: 'shown.bs.tab',
-        relatedTarget: previous
+        relatedTarget: $previous[0]
       })
     })
   }
-- 
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