Forces email

app.py

@@ -293,6 +293,13 @@ with gr.Blocks(theme = theme) as user_eval:
             gr.Markdown("Thank you so much for your participation in our study! We're using emails to keep track of which questions you've answered and which you haven't seen. Use the same email every time to keep your progress saved. :)")
             email = gr.Textbox(label = "Email", placeholder = "you@email.com")
             s = gr.Button("Start!")
+            
+            def sanitize_login(text):
+                if text == "":
+                    return {s: gr.Button(interactive = False)}
+                else:
+                    return {s: gr.Button(interactive = True)}
+            email.change(fn = sanitize_login, inputs = [email], outputs = [s])
       
             def submit_email(email):
                 global user_id