[d_k_f]

Like I said: If you want to use the JS-based functionality, you obviously have to register it. Simply using any made-up element in your HTML and styling it via CSS just works ouf the box. See https://codepen.io/dkoch-org/pen/yLwPVYG for a quick example.

[troupo]

How exactly is this different from "the 'div/span-tag soup' as he calls it"? You just renamed some divs, and relied on the standardised behaviour of unknown tags. They are indistinguishable (and just as non-componentised and non-reusable) as the div/span soup.

[globular-toast]

How is `def reduce(numerator, denominator)` different from `def f(a, b)`?