From 46686f7f94a0b494c455a87f06c41178124dc462 Mon Sep 17 00:00:00 2001
From: Luke Wilde <lukew@serenityos.org>
Date: Fri, 1 Oct 2021 01:33:10 +0100
Subject: [PATCH] LibWeb: Implement MediaQueryList.onchange

---
 Userland/Libraries/LibWeb/CSS/MediaQueryList.cpp | 11 +++++++++++
 Userland/Libraries/LibWeb/CSS/MediaQueryList.h   |  3 +++
 Userland/Libraries/LibWeb/CSS/MediaQueryList.idl |  3 +--
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/Userland/Libraries/LibWeb/CSS/MediaQueryList.cpp b/Userland/Libraries/LibWeb/CSS/MediaQueryList.cpp
index 5d1c9c23ce..2af28d4128 100644
--- a/Userland/Libraries/LibWeb/CSS/MediaQueryList.cpp
+++ b/Userland/Libraries/LibWeb/CSS/MediaQueryList.cpp
@@ -9,6 +9,7 @@
 #include <LibWeb/DOM/Document.h>
 #include <LibWeb/DOM/EventDispatcher.h>
 #include <LibWeb/DOM/EventListener.h>
+#include <LibWeb/HTML/EventHandler.h>
 
 namespace Web::CSS {
 
@@ -65,4 +66,14 @@ void MediaQueryList::remove_listener(RefPtr<DOM::EventListener> listener)
     remove_event_listener(HTML::EventNames::change, listener);
 }
 
+void MediaQueryList::set_onchange(HTML::EventHandler event_handler)
+{
+    set_event_handler_attribute(HTML::EventNames::change, event_handler);
+}
+
+HTML::EventHandler MediaQueryList::onchange()
+{
+    return event_handler_attribute(HTML::EventNames::change);
+}
+
 }
diff --git a/Userland/Libraries/LibWeb/CSS/MediaQueryList.h b/Userland/Libraries/LibWeb/CSS/MediaQueryList.h
index 906f8e5acc..117da92d1b 100644
--- a/Userland/Libraries/LibWeb/CSS/MediaQueryList.h
+++ b/Userland/Libraries/LibWeb/CSS/MediaQueryList.h
@@ -44,6 +44,9 @@ public:
     void add_listener(RefPtr<DOM::EventListener> listener);
     void remove_listener(RefPtr<DOM::EventListener> listener);
 
+    void set_onchange(HTML::EventHandler);
+    HTML::EventHandler onchange();
+
 private:
     MediaQueryList(DOM::Document&, String);
 
diff --git a/Userland/Libraries/LibWeb/CSS/MediaQueryList.idl b/Userland/Libraries/LibWeb/CSS/MediaQueryList.idl
index d5cb27209a..dcd72c50d8 100644
--- a/Userland/Libraries/LibWeb/CSS/MediaQueryList.idl
+++ b/Userland/Libraries/LibWeb/CSS/MediaQueryList.idl
@@ -2,8 +2,7 @@
 interface MediaQueryList : EventTarget {
     readonly attribute CSSOMString media;
     readonly attribute boolean matches;
-    // TODO:
     undefined addListener(EventListener? callback);
     undefined removeListener(EventListener? callback);
-    // attribute EventHandler onchange;
+    attribute EventHandler onchange;
 };