add click function for testing js

app.py

@@ -113,12 +113,14 @@ with gr.Blocks(theme=seafoam, css=css) as demo:
         f = gr.HTML(html, label="Achievement Log", elem_id="achievement_log")
 
     with gr.Row():
-        input = gr.Textbox(elem_id='user_id')
-        output = gr.Textbox()
-
-    def print_text():
-        return "Yes, babe!"
-    input.change(print_text, None, output)
+        i = gr.Textbox(value='0', elem_id="test1")
+        o = gr.Textbox()
+        b = gr.Button(elem_id="test2")
+
+    def print_text(t):
+        return t
+        
+    b.click(print_text, i, o,)
 
 if __name__ == "__main__":
     demo.launch()