yielding

app.py

@@ -1,7 +1,11 @@
 import gradio as gr
+import time
 
 def chat(message, history):
-    return str(message)
+    answer = str(message)
+    for i in range(len(answer)):
+        time.sleep(0.3)
+        yield answer[:i+1]
 
 demo = gr.ChatInterface(
     fn=chat,