From c0647485362cb7a0692586c0e7b77fc662a52457 Mon Sep 17 00:00:00 2001
From: Wesley Cho <wesley.cho@gmail.com>
Date: Wed, 9 Sep 2015 05:08:55 -0400
Subject: [PATCH] chore(accordion): change to `!!`

---
 src/accordion/accordion.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/accordion/accordion.js b/src/accordion/accordion.js
index 7684995198..8e6f870f2b 100644
--- a/src/accordion/accordion.js
+++ b/src/accordion/accordion.js
@@ -82,7 +82,7 @@ angular.module('ui.bootstrap.accordion', ['ui.bootstrap.collapse'])
       scope.openClass = attrs.openClass || 'panel-open';
       scope.panelClass = attrs.panelClass;
       scope.$watch('isOpen', function(value) {
-        element.toggleClass(scope.openClass, Boolean(value));
+        element.toggleClass(scope.openClass, !!value);
         if (value) {
           accordionCtrl.closeOthers(scope);
         }