fix: add back events

packages/mdc-dom/events.ts

@@ -0,0 +1,25 @@
+/**
+ * @license
+ * Copyright 2019 Google Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+export type EventType = keyof GlobalEventHandlersEventMap;
+export type SpecificEventListener<K extends EventType> = (evt: GlobalEventHandlersEventMap[K]) => void;

packages/mdc-dom/index.ts

@@ -22,5 +22,6 @@
  */
 
 import * as ponyfill from './ponyfill';
+import {EventType, SpecificEventListener} from './events';
 
-export {ponyfill};
+export {EventType, ponyfill, SpecificEventListener};