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-rw-r--r--js/collapse.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/js/collapse.js b/js/collapse.js
index f8b65b393..b2678e0a5 100644
--- a/js/collapse.js
+++ b/js/collapse.js
@@ -77,7 +77,7 @@
[dimension](size || 'auto')
[0].offsetWidth
- this.$element[size !== null ? 'addClass' : 'removeClass']('collapse')
+ this.$element[size != null ? 'addClass' : 'removeClass']('collapse')
return this
}