1 files changed, 25 insertions, 0 deletions
diff --git a/dom/webidl/WritableStream.webidl b/dom/webidl/WritableStream.webidl
new file mode 100644
index 0000000000..b368de8057
--- /dev/null
+++ b/dom/webidl/WritableStream.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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://streams.spec.whatwg.org/#ws-class-definition
+ */
+
+[Exposed=*] // [Transferable] - See Bug 1562065
+interface WritableStream {
+  [Throws]
+  constructor(optional object underlyingSink, optional QueuingStrategy strategy = {});
+
+  readonly attribute boolean locked;
+
+  [Throws]
+  Promise<undefined> abort(optional any reason);
+
+  [NewObject]
+  Promise<undefined> close();
+
+  [Throws]
+  WritableStreamDefaultWriter getWriter();
+};