Fixes #4701

10 years ago · 2a5f1b92b4
1 changed files with 1 additions and 1 deletions
--- a/Alert.php
+++ b/Alert.php
@ -140,7 +140,7 @@ class Alert extends Widget
        Html::addCssClass($this->options, 'fade');
        Html::addCssClass($this->options, 'in');
-        if ($this->closeButton !== null) {
+        if ($this->closeButton !== false) {
            $this->closeButton = array_merge([
                'data-dismiss' => 'alert',
                'aria-hidden' => 'true',