jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS code ... one of the examples — Delayed ...

Streamlit lets you write web-based Python data applications without HTML, CSS, or JavaScript ... Here’s a simple example of a Streamlit app: import streamlit as st st.title("Take input from ...

There are many different solutions but the main gotcha is that generating them tends to lean on things like JavaScript, requires lengthy chunks of not-particularly-human-readable code, or other ...