Rename ui to browser

src/browser/Lifecycle.ts

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) 2018 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { IDisposable } from 'common/Types';
+
+/**
+ * Adds a disposable listener to a node in the DOM, returning the disposable.
+ * @param type The event type.
+ * @param handler The handler for the listener.
+ */
+export function addDisposableDomListener(
+  node: Element | Window | Document,
+  type: string,
+  handler: (e: any) => void,
+  useCapture?: boolean
+): IDisposable {
+  node.addEventListener(type, handler, useCapture);
+  return {
+    dispose: () => {
+      if (!handler) {
+        // Already disposed
+        return;
+      }
+      node.removeEventListener(type, handler, useCapture);
+    }
+  };
+}