I doubt that there is another solution otherwise he would have covered it seen as it was only posted a few days ago, but I may be wrong?
In my opinion, I don’t think that the second solution is a problem; it works right?
Anyone reading the HTML would see it’s navigation because it is wrapped in <nav>.
If it was me, I would just go for the CSS only method because keeping JS to a minimum in most cases makes for a faster page.
