1 files changed, 16 insertions, 0 deletions
diff --git a/dom/workers/test/instanceof_worker.js b/dom/workers/test/instanceof_worker.js
new file mode 100644
index 0000000000..a7f3ab418d
--- /dev/null
+++ b/dom/workers/test/instanceof_worker.js
@@ -0,0 +1,16 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+onmessage = function (event) {
+  postMessage({
+    event: "XMLHttpRequest",
+    status: new XMLHttpRequest() instanceof XMLHttpRequest,
+    last: false,
+  });
+  postMessage({
+    event: "XMLHttpRequestUpload",
+    status: new XMLHttpRequest().upload instanceof XMLHttpRequestUpload,
+    last: true,
+  });
+};