I ran across a couple of issues:<p>* highlight to copy is broken (I assume because the source is not first-class text and they manipulate the clipboard with JS)<p>* failing to close the last list item in a ul causes the preview window to stop updating and highlights the next line in the editor but doesn&#x27;t provide any indication of what is wrong<p>This is definitely not going to be sufficient for professional programming or web development but it looks and performs far better than similar projects I&#x27;ve seen in the past.