diff --git a/Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.cpp b/Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.cpp
index 8c89652543..5642ae46f8 100644
--- a/Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.cpp
+++ b/Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.cpp
@@ -23,4 +23,30 @@ EventLoop& main_thread_event_loop()
     return static_cast<Bindings::WebEngineCustomData*>(Bindings::main_thread_vm().custom_data())->event_loop;
 }
 
+// https://html.spec.whatwg.org/multipage/webappapis.html#spin-the-event-loop
+void EventLoop::spin_until([[maybe_unused]] Function<bool()> goal_condition)
+{
+    // FIXME: 1. Let task be the event loop's currently running task.
+
+    // FIXME: 2. Let task source be task's source.
+
+    // FIXME: 3. Let old stack be a copy of the JavaScript execution context stack.
+
+    // FIXME: 4. Empty the JavaScript execution context stack.
+
+    // FIXME: 5. Perform a microtask checkpoint.
+
+    // FIXME: 6. In parallel:
+
+    // FIXME:    1. Wait until the condition goal is met.
+
+    // FIXME:    2. Queue a task on task source to:
+
+    // FIXME:       1. Replace the JavaScript execution context stack with old stack.
+
+    // FIXME:       2. Perform any steps that appear after this spin the event loop instance in the original algorithm.
+
+    // FIXME: 7. Stop task, allowing whatever algorithm that invoked it to resume.
+}
+
 }
diff --git a/Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.h b/Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.h
index 5f1ecf878e..9e55ca4369 100644
--- a/Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.h
+++ b/Userland/Libraries/LibWeb/HTML/EventLoop/EventLoop.h
@@ -19,6 +19,8 @@ public:
     TaskQueue& task_queue() { return m_task_queue; }
     TaskQueue const& task_queue() const { return m_task_queue; }
 
+    void spin_until(Function<bool()> goal_condition);
+
 private:
     TaskQueue m_task_queue;
 };