How do you use multiple css classes in HAML?

Question

If I am chaining multiple css classes where the HTML would come out looking like:

<a class="btn primary large">

How would I do this in HAML? These guesses didn't work:

.btn-primary-large
."btn-primary-large"

Answer 1

Use dots instead of dashes:

.btn.primary.large

Answer 2

Question didn't specifically ask for a Haml+Ruby solution, but here is one for those who are interested. It uses a literal array.

%a{ class: %w[btn primary large] }