Veronica , Mmenu is handled with just the plugin on this Template (so, it doesn't use the JS described in the attached article).

Do you want me to emulate this effect with CSS, or should I do something else?

Veronica , as this isn't just a simple switch or line of code (and instead seems to require instantiating and using Mmenu entirely manually), can we please archive this to-do?

yes

(to archiving)