There seems to be a bit of opinion and a bit of BEM [1] in this style guide.<p>Personally I have been using BEM for larger projects and in that context it works quite well.<p>[1] <a href="https:&#x2F;&#x2F;en.bem.info&#x2F;articles&#x2F;why-bem-in-a-nutshell&#x2F;" rel="nofollow">https:&#x2F;&#x2F;en.bem.info&#x2F;articles&#x2F;why-bem-in-a-nutshell&#x2F;</a>