It doesn’t really bother me.

It seems to link to the authors codepen. If you us code pen you can bookmark the snippets. Codepen colorizes the html/css etc.

Link rot is a thing though, so it’s not always ideal to have dependencies on third party urls staying the same.

Bothered me greatly. Should have done on-page AND a link to codepen for you to play with

So much about html only that makes me load 2mb of code pen and heavy ui to see the example. Yeah it’s terrible ux. same as most of the examples are bad