Stacking doesn't work

[gossi]

stack classes class="fa-stack-2x" will get filtered in getClasses() method. Adding a stack argument is the nicest thing to fix this 😄

[robmadole]

Stacking has been replaced with layers in the SVG implementation. Would this work for you?

[maxymczech]

It seems stacking is a feature still present in FontAwesome 5:

https://fontawesome.com/how-to-use/on-the-web/styling/stacking-icons

Would it kill you to just add {{#fa-stack}} component in your distribution?

[robmadole]

@dantistus no it wouldn't kill us. But we think that layers is an upgrade and works much better than stacks. You can still use those classes and markup if you like; there is nothing preventing you from it.