From ac397cae49a9a8e4bd78617eb70e563e21dc7a4f Mon Sep 17 00:00:00 2001
From: Ashwin Ramaswami <aramaswamis@gmail.com>
Date: Fri, 12 Apr 2019 08:43:01 -0700
Subject: [PATCH] fix: do not error when File is not defined (#1253)

---
 src/utils.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/utils.js b/src/utils.js
index ce13634b5d..a4b2c8af15 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -229,7 +229,7 @@ export function getUiOptions(uiSchema) {
 }
 
 export function isObject(thing) {
-  if (thing instanceof File) {
+  if (typeof File !== "undefined" && thing instanceof File) {
     return false;
   }
   return typeof thing === "object" && thing !== null && !Array.isArray(thing);