1 files changed, 15 insertions, 0 deletions
diff --git a/testing/web-platform/tests/presentation-api/receiving-ua/serviceworker.js b/testing/web-platform/tests/presentation-api/receiving-ua/serviceworker.js
new file mode 100644
index 0000000000..ae50ad6498
--- /dev/null
+++ b/testing/web-platform/tests/presentation-api/receiving-ua/serviceworker.js
@@ -0,0 +1,15 @@
+self.addEventListener('install', () => {
+    // activate this service worker immediately
+    self.skipWaiting();
+});
+
+self.addEventListener('activate', event => {
+    // let this service worker control window clients immediately
+    event.waitUntil(self.clients.claim());
+});
+
+self.addEventListener('message', event => {
+    event.waitUntil(clients.matchAll().then(windows => {
+        event.ports[0].postMessage(windows.map(w => { return w.url; }).sort());
+    }));
+});