D3 and React, who should control the DOM? After all, React’s whole purpose is managing updates to the DOM so we don’t have to. D3, on the other hand, is a library for building data visualizations, and it too needs access to the DOM. And stepping back, when should we even use D3 and React together? In this talk, I will give guidelines on when React should have ownership of the DOM, and when D3 should instead. More importantly, I will cover the interactions and applications that will benefit the most from using D3 and React, together.