1 files changed, 22 insertions, 0 deletions
diff --git a/dom/serviceworkers/test/worker_unregister.js b/dom/serviceworkers/test/worker_unregister.js
new file mode 100644
index 0000000000..6aa7c3d501
--- /dev/null
+++ b/dom/serviceworkers/test/worker_unregister.js
@@ -0,0 +1,22 @@
+onmessage = function (e) {
+  clients.matchAll().then(function (c) {
+    if (c.length === 0) {
+      // We cannot proceed.
+      return;
+    }
+
+    registration
+      .unregister()
+      .then(
+        function () {
+          c[0].postMessage("DONE");
+        },
+        function () {
+          c[0].postMessage("ERROR");
+        }
+      )
+      .then(function () {
+        c[0].postMessage("FINISH");
+      });
+  });
+};