Allow logout when JavaScript is disabled

views/layouts/main.php

@@ -39,13 +39,18 @@ AppAsset::register($this);
             ['label' => 'Home', 'url' => ['/site/index']],
             ['label' => 'About', 'url' => ['/site/about']],
             ['label' => 'Contact', 'url' => ['/site/contact']],
-            Yii::$app->user->isGuest ?
-                ['label' => 'Login', 'url' => ['/site/login']] :
-                [
-                    'label' => 'Logout (' . Yii::$app->user->identity->username . ')',
-                    'url' => ['/site/logout'],
-                    'linkOptions' => ['data-method' => 'post']
-                ],
+            Yii::$app->user->isGuest ? (
+                ['label' => 'Login', 'url' => ['/site/login']]
+            ) : (
+                '<li>'
+                . Html::beginForm(['/site/logout'], 'post')
+                . Html::submitButton(
+                    'Logout (' . Yii::$app->user->identity->username . ')',
+                    ['class' => 'btn btn-link']
+                )
+                . Html::endForm()
+                . '</li>'
+            )
         ],
     ]);
     NavBar::end();