Context has always been a mysterious feature of React. Here's a great breakdown of what it is as well as why and when you would use it.
Since 2012, Pinterest scaled their web framework Denzel (named after the greatest actor of all time) on top of Backbone. But nowadays, React is a golden standard. It has a large developer community and enables excellent engineering velocity and performance. In this post, you’ll look at techniques they tried and challenges they faced while migrating to React, starting with Pinterest profiles.
D3 is one of the most ubiquitous data visualization libraries on the web, but it's use with React isn't always as straight forward as one might hope. Christophe Rosset demystifies some of the tricky points with his examples of using D3 with React.