Small Menu Interaction

Redesigning my firm portfolio and developing it in React/Gatsby & been loving @designcode tutorial, very insightful but have wanted to extend my interaction design.

I'm trying to find a developer that can help me figure out how to do this in React or any tutorial that would help, I am just learning React and the interactions are def. a big learning step for me.

If you know of someone that can do this or a codepen.io example that would be awesome.