1 files changed, 15 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-data-url.window.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-data-url.window.js
new file mode 100644
index 0000000000..cf39b01107
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-data-url.window.js
@@ -0,0 +1,15 @@
+// META: title=data: URL navigation started from unload handler must be ignored
+// META: script=../resources/helpers.js
+
+promise_test(async () => {
+  const iframe = await addIframe();
+
+  iframe.contentWindow.addEventListener("unload", () => {
+    iframe.contentWindow.location.href =
+      `data:text/html,unload<script>parent.postMessage('fail', '*');</script>`;
+  });
+
+  iframe.src =
+    `data:text/html,load<script>parent.postMessage('pass', '*')</script>`;
+  assert_equals(await waitForMessage(iframe.contentWindow), "pass");
+});