Semantic UI – another Less framework
Semantic can be used to build frontends too. Just like Bootstrap, it contains CSS components and modules. Components have been split up in to elements, collections, and views. Modules require not only CSS, but also JavaScript.
Semantic's name already makes clear that it pays attention to the semantics of HTML5. It is also tag-agnostic, which means you can use any HTML tags with UI elements.
In the following code, you will find a short HTML example that shows how Semantic is intended to be used:
<main class="ui three column grid"> <aside class="column">1</aside> <section class="column">2</section> <section class="column">3</section> </main>
Also, Semantic has been built with Less. The complete source, including the Less files, can be downloaded from https://github.com/semantic-org/semantic-ui/.
The way Semantic handles Less differs from Bootstrap and most of the examples you have seen earlier in this book...