1 files changed, 7 insertions, 0 deletions
diff --git a/testing/web-platform/tests/web-locks/resources/service-worker.js b/testing/web-platform/tests/web-locks/resources/service-worker.js
new file mode 100644
index 0000000000..027863e33e
--- /dev/null
+++ b/testing/web-platform/tests/web-locks/resources/service-worker.js
@@ -0,0 +1,7 @@
+// Responds to '/clientId' with the request's clientId.
+self.addEventListener('fetch', e => {
+  if (new URL(e.request.url).pathname === '/clientId') {
+    e.respondWith(new Response(JSON.stringify({clientId: e.clientId})));
+    return;
+  }
+});