1 files changed, 10 insertions, 0 deletions
diff --git a/tests/wpt/web-platform-tests/workers/support/post-message-on-load-worker.js b/tests/wpt/web-platform-tests/workers/support/post-message-on-load-worker.js
new file mode 100644
index 00000000000..e1c547ab6a4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/workers/support/post-message-on-load-worker.js
@@ -0,0 +1,10 @@
+if ('DedicatedWorkerGlobalScope' in self &&
+    self instanceof DedicatedWorkerGlobalScope) {
+  postMessage('LOADED');
+} else if (
+    'SharedWorkerGlobalScope' in self &&
+    self instanceof SharedWorkerGlobalScope) {
+  self.onconnect = e => {
+    e.ports[0].postMessage('LOADED');
+  };
+}