That's because it uses [markdeep](https://casual-effects.com/markdeep/ https://casual-effects.com/markdeep/), which lets you add a <script> and stylesheet tag t

That's because it uses [markdeep](https://casual-effects.com/markdeep/ https://casual-effects.com/markdeep/), which lets you add a <script> and stylesheet tag to your markdown file to have any JS-enabled browser render it as HTML. If you backslash/view source, you can see the original markdown with the <script> and stylesheet tags. Markdeep is the single best Markdown implementation I have ever used. The generated pages are beautiful and it supports a vast number of features. If I want to save a processed page as plain HTML, I just have to save the page's current state.