Migrate errors

Summary: _typescript_

Reviewed By: jknoxville

Differential Revision: D16710217

fbshipit-source-id: a6596f84d6002f1972ae17170f9decaed853f991

src/utils/errors.tsx

@@ -0,0 +1,16 @@
+/**
+ * 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 function getStringFromErrorLike(e: any) {
+  if (typeof e == 'string') {
+    return e;
+  } else if (e instanceof Error) {
+    return e.message;
+  } else {
+    return JSON.stringify(e);
+  }
+}