How do you change the contents of a form based on radio buttons?

[edsaac]

@plokmijn12345, this thread probably answers your question:

Updating radio inside a form

Widgets can change if they are defined outside the form but are positioned inside the form using a placeholder like st.empty. Not sure if that is expected behavior or not, but looks like a feature to me [dynamicForm] Code: import streamlit as st with st.form("myform"): "### A form" # These exist within the form but won't wait for the submit button placeholder_for_radio = st.empty() placeholder_for_selectbox = st.empty() # Other components actually wait fo…