Convert utils/promiseTimeout to TS

Reviewed By: danielbuechele

Differential Revision: D16710520

fbshipit-source-id: 146ec33537de038d59e6f13647ee0de7b9edbcb8

src/utils/promiseTimeout.tsx

@@ -0,0 +1,23 @@
+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+export default function promiseTimeout<T>(
+  ms: number,
+  promise: Promise<T>,
+  timeoutMessage?: string,
+): Promise<T> {
+  // Create a promise that rejects in <ms> milliseconds
+  const timeout: Promise<T> = new Promise((resolve, reject) => {
+    const id = setTimeout(() => {
+      clearTimeout(id);
+      reject(new Error(timeoutMessage || `Timed out in ${ms} ms.`));
+    }, ms);
+  });
+
+  // Returns a race between our timeout and the passed in promise
+  return Promise.race([promise, timeout]);
+}