1 files changed, 45 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/interactive-elements/the-dialog-element/dialog-inert.html b/testing/web-platform/tests/html/semantics/interactive-elements/the-dialog-element/dialog-inert.html
new file mode 100644
index 0000000000..864420b9d2
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/interactive-elements/the-dialog-element/dialog-inert.html
@@ -0,0 +1,45 @@
+<!doctype html>
+<meta charset=utf-8>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="author" title="Mozilla" href="https://mozilla.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+  body { margin: 0 }
+  dialog {
+    width: 100%;
+    height: 100%;
+    max-width: 100%;
+    max-height: 100%;
+    box-sizing: border-box;
+    padding: 0;
+  }
+  dialog::backdrop {
+    display: none;
+  }
+</style>
+<dialog id=dialog>Something</dialog>
+<script>
+test(function() {
+  let dialog = document.getElementById("dialog");
+  dialog.showModal();
+  assert_equals(
+    document.elementFromPoint(10, 10),
+    dialog,
+    "Dialog is hittable by default",
+  );
+  dialog.inert = true;
+  assert_not_equals(
+    document.elementFromPoint(10, 10),
+    dialog,
+    "Dialog becomes inert dynamically",
+  );
+  dialog.close();
+  dialog.showModal();
+  assert_not_equals(
+    document.elementFromPoint(10, 10),
+    dialog,
+    "Dialog remains inert after open",
+  );
+});
+</script>