Frontend Development: Atom vs. VS Code vs. Nuclide

Currently looking for a decent IDE to Code HTML/CSS/JS. The Contenders are Atom, Nuclide and VS Code.

I have been using Atom for quite a while, and really like the eco-system and hackability of it. Also code editing features are a pleasure to work with. However, I noticed a need for integrated debugging.

So of all these requirements:

• hackability
• available extensions
• editing features
• debugging
• (performance)

how do these editors compare? Which extensions do you use or consider helpful?