1 files changed, 9 insertions, 0 deletions
diff --git a/dom/workers/test/file_use_counter_service_worker.js b/dom/workers/test/file_use_counter_service_worker.js
new file mode 100644
index 0000000000..8ee0d2e04a
--- /dev/null
+++ b/dom/workers/test/file_use_counter_service_worker.js
@@ -0,0 +1,9 @@
+onmessage = async function (e) {
+  if (e.data === "RUN") {
+    console.log("worker runs");
+    await clients.claim();
+    clients.matchAll().then(res => {
+      res.forEach(client => client.postMessage("DONE"));
+    });
+  }
+};