From cd83867d21421093bd41975acbdeceacc1470205 Mon Sep 17 00:00:00 2001
From: kwaroran <amasio1234@proton.me>
Date: Fri, 6 Sep 2024 00:16:52 +0900
Subject: [PATCH] Add beforeunload

---
 src/preload.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/preload.ts b/src/preload.ts
index 53b9190e..b0bcb56b 100644
--- a/src/preload.ts
+++ b/src/preload.ts
@@ -19,6 +19,15 @@ export function preLoadCheck(){
     else if(searchParams.has('mainpage')) {
         localStorage.setItem('mainpage', searchParams.get('mainpage'));
     }
+
+    if(isWeb) {
+        //Add beforeunload event listener to prevent the user from leaving the page
+        window.addEventListener('beforeunload', (e) => {
+            e.preventDefault()
+            //legacy browser
+            e.returnValue = true
+        })
+    }
     
     
     // Redirect to the main page if the user has not visited the main page