1 files changed, 13 insertions, 0 deletions
diff --git a/js/core.ts b/js/core.ts
new file mode 100644
index 000000000..9e94ffdbb
--- /dev/null
+++ b/js/core.ts
@@ -0,0 +1,13 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { window } from "./window";
+
+type MessageCallback = (msg: Uint8Array) => void;
+
+// Declared in core/shared_queue.js.
+interface DenoCore {
+  setAsyncHandler(cb: MessageCallback): void;
+  dispatch(control: Uint8Array, zeroCopy?: Uint8Array): null | Uint8Array;
+}
+
+// TODO(ry) Rename to Deno.core.shared and Deno.core.setAsyncHandler.
+export const DenoCore = window.DenoCore as DenoCore;