fix js errors when restarting UI

1 files changed, 2 insertions, 1 deletions

diff --git a/script.js b/script.js
index 0e117d06..21960d91 100644
--- a/script.js
+++ b/script.js
@@ -1,5 +1,6 @@
 function gradioApp() {
-    const gradioShadowRoot = document.getElementsByTagName('gradio-app')[0].shadowRoot
+    const elems = document.getElementsByTagName('gradio-app')
+    const gradioShadowRoot = elems.length == 0 ? null : elems[0].shadowRoot
     return !!gradioShadowRoot ? gradioShadowRoot : document;
 }