1 files changed, 16 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/interaction/focus/composed.window.js b/testing/web-platform/tests/html/interaction/focus/composed.window.js
new file mode 100644
index 0000000000..8951afc4e0
--- /dev/null
+++ b/testing/web-platform/tests/html/interaction/focus/composed.window.js
@@ -0,0 +1,16 @@
+async_test(t => {
+  const input = document.body.appendChild(document.createElement("input"));
+  let happened = false;
+  input.onfocus = t.step_func(e => {
+    happened = true;
+    assert_equals(e.type, "focus");
+    assert_true(e.composed);
+  });
+  input.focus();
+  input.onblur = t.step_func_done(e => {
+    assert_true(happened);
+    assert_equals(e.type, "blur");
+    assert_true(e.composed);
+  });
+  input.blur();
+}, "Focus events are composed");