cf. https://frontendmasters.com/blog/capo-js-a-five-minute-web-performance-boost/

https://rviscomi.github.io/capo.js/user/demo/

Thanks to Anthhony, I now have a better option 🙇

Using `<script>toggleTheme('dark')</script>` directly from the markdown given it's already availale from the head declaration. As a bonus, we don't mess with user's preferences for other pages.

It appears that some parsers are trying to retrieve the title of a page without striping off HTML comments first.

This is stupidily funny :)

“Flash Of Default Theme”

See https://mxb.dev/blog/color-theme-switcher/

I had to move the theme definition to the html element (vs. body) with the side-effect to have a consistent scrollbar color.