1 files changed, 23 insertions, 0 deletions
diff --git a/components/script/dom/webidls/MessagePort.webidl b/components/script/dom/webidls/MessagePort.webidl
new file mode 100644
index 00000000000..58a3f06a960
--- /dev/null
+++ b/components/script/dom/webidls/MessagePort.webidl
@@ -0,0 +1,23 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is:
+ * https://html.spec.whatwg.org/multipage/#messageport
+ */
+
+[Exposed=(Window,Worker)]
+interface MessagePort : EventTarget {
+  [Throws] void postMessage(any message, sequence<object> transfer);
+  [Throws] void postMessage(any message, optional PostMessageOptions options = {});
+  void start();
+  void close();
+
+  // event handlers
+  attribute EventHandler onmessage;
+  attribute EventHandler onmessageerror;
+};
+
+dictionary PostMessageOptions {
+  sequence<object> transfer = [];
+};