Simple feedback server

feedback-server/externs/node/stream/web/IWritableStreamDefaultController.hx

@@ -0,0 +1,11 @@
+package node.stream.web;
+
+/**
+	This Streams API interface represents a controller allowing control of a
+	WritableStream's state. When constructing a WritableStream, the
+	underlying sink is given a corresponding WritableStreamDefaultController
+	instance to manipulate.
+**/
+typedef IWritableStreamDefaultController = {
+	function error(?e:Dynamic):Void;
+};