This morning a tweet by Heydon Pickering landed in my timeline, where he quoted a text that started 10 things to learn for becoming a solid full-stack JavaScript developer, only to include a paragraph As for HTML, there's not much to learn right away and you can kind of learn as you go, but before making your frist templates, know the difference between in-line elements like <span> and how they differ from block ones like <div>.

Heydon aptly commented this with How Full Stack Development is destroying the web: a story in two pictures.(Source)

This triggered me (not his ...