From ce04b268c3add587289e5e787e53a2d94c39417e Mon Sep 17 00:00:00 2001
From: cuom1999 <lephuocdinh99@gmail.com>
Date: Mon, 5 Feb 2024 15:17:02 -0600
Subject: [PATCH] Cache back button

---
 resources/common.js | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/resources/common.js b/resources/common.js
index 4281bf5..2f579a7 100644
--- a/resources/common.js
+++ b/resources/common.js
@@ -467,4 +467,28 @@ $(function() {
         $nav_list.hide();
     });
 
+    $(window).on('beforeunload', function() {
+        let key = `oj-content-${window.location.href}`;
+        let $contentClone = $('#content').clone();
+        $contentClone.find('.select2').remove();
+            $contentClone.find('.select2-hidden-accessible').removeClass('select2-hidden-accessible');
+        sessionStorage.setItem(key, JSON.stringify({
+          "html": $contentClone.html(),
+          "page": window.page,
+          "has_next_page": window.has_next_page,
+        }));
+    });
+    if (window.performance && 
+      window.performance.navigation.type 
+      === window.performance.navigation.TYPE_BACK_FORWARD) {
+        let key = `oj-content-${window.location.href}`;
+        let content = sessionStorage.getItem(key);
+        if (content) {    
+            content = JSON.parse(content);
+            $('#content').html(content.html);
+            onWindowReady();
+            window.page = content.page;
+            window.has_next_page = content.has_next_page;
+        }
+    }
 });
\ No newline at end of file