From 342f75f0f6a3e6e99016a4fded16742ecda752b6 Mon Sep 17 00:00:00 2001
From: hikaru-y <hkrysg@gmail.com>
Date: Sun, 20 Jun 2021 03:31:41 +0900
Subject: [PATCH] Toggle night-mode class of documentElement when action
 triggered

---
 qt/aqt/clayout.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/qt/aqt/clayout.py b/qt/aqt/clayout.py
index aa1c36c0f..b3a44e48e 100644
--- a/qt/aqt/clayout.py
+++ b/qt/aqt/clayout.py
@@ -344,6 +344,10 @@ class CardLayout(QDialog):
 
     def on_night_mode_action_toggled(self) -> None:
         self.night_mode_is_enabled = not self.night_mode_is_enabled
+        force = json.dumps(self.night_mode_is_enabled)
+        self.preview_web.eval(
+            f"document.documentElement.classList.toggle('night-mode', {force});"
+        )
         self.on_preview_toggled()
 
     def on_mobile_class_action_toggled(self) -> None: