Update app.py

app.py

@@ -1,4 +1,14 @@
 import streamlit as st
+from streamlit.components.v1 import html
 
-x = st.slider('Select a value')
-st.write(x, 'squared is', x * x)
+# Define your javascript
+my_js = """
+alert("Hola mundo");
+"""
+
+# Wrapt the javascript as html code
+my_html = f"<script>{my_js}</script>"
+
+# Execute your app
+st.title("Javascript example")
+html(my_html)