diff --git a/Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp b/Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp
index 03f590b337d..b648577a340 100644
--- a/Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp
+++ b/Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp
@@ -190,6 +190,38 @@ int TraversableNavigable::get_the_used_step(int step) const
     return result.value();
 }
 
+// https://html.spec.whatwg.org/multipage/browsing-the-web.html#get-all-navigables-whose-current-session-history-entry-will-change-or-reload
+Vector<JS::Handle<Navigable>> TraversableNavigable::get_all_navigables_whose_current_session_history_entry_will_change_or_reload(int target_step) const
+{
+    // 1. Let results be an empty list.
+    Vector<JS::Handle<Navigable>> results;
+
+    // 2. Let navigablesToCheck be « traversable ».
+    Vector<JS::Handle<Navigable>> navigables_to_check;
+    navigables_to_check.append(const_cast<TraversableNavigable&>(*this));
+
+    // 3. For each navigable of navigablesToCheck:
+    while (!navigables_to_check.is_empty()) {
+        auto navigable = navigables_to_check.take_first();
+
+        // 1. Let targetEntry be the result of getting the target history entry given navigable and targetStep.
+        auto target_entry = navigable->get_the_target_history_entry(target_step);
+
+        // 2. If targetEntry is not navigable's current session history entry or targetEntry's document state's reload pending is true, then append navigable to results.
+        if (target_entry != navigable->current_session_history_entry() || target_entry->document_state->reload_pending()) {
+            results.append(*navigable);
+        }
+
+        // 3. If targetEntry's document is navigable's document, and targetEntry's document state's reload pending is false, then extend navigablesToCheck with the child navigables of navigable.
+        if (target_entry->document_state->document() == navigable->active_document() && !target_entry->document_state->reload_pending()) {
+            navigables_to_check.extend(navigable->child_navigables());
+        }
+    }
+
+    // 4. Return results.
+    return results;
+}
+
 // https://html.spec.whatwg.org/multipage/browsing-the-web.html#clear-the-forward-session-history
 void TraversableNavigable::clear_the_forward_session_history()
 {
diff --git a/Userland/Libraries/LibWeb/HTML/TraversableNavigable.h b/Userland/Libraries/LibWeb/HTML/TraversableNavigable.h
index 74ee782fb10..66fa313a181 100644
--- a/Userland/Libraries/LibWeb/HTML/TraversableNavigable.h
+++ b/Userland/Libraries/LibWeb/HTML/TraversableNavigable.h
@@ -37,6 +37,7 @@ public:
     HistoryObjectLengthAndIndex get_the_history_object_length_and_index(int) const;
 
     int get_the_used_step(int step) const;
+    Vector<JS::Handle<Navigable>> get_all_navigables_whose_current_session_history_entry_will_change_or_reload(int) const;
     Vector<int> get_all_used_history_steps() const;
     void clear_the_forward_session_history();