Components and Elements are two often misunderstood concepts in React. This blog post clears it up. It's surprisingly more simple than you'd think.
Em Smith shares her insights on React.js application security, and how it is important to remember that just because you're using modern tools doesn't mean you're safe from security flaws.
With all the different frameworks out there, and subsequent framework bashing, Sean Kilgarriff takes it to a positive note and talks about some of the more abstract benefits of using react.
One of the coolest thing about building things with React is that there is a lot of flexibility around how you can do things. Coming from other frontend tools I had to make a lot of adjustments when realizing there wasn't a single correct way of doing things. Domagoj Kriskovic talks about another way to use React with his Recycle library, check it out!
SEO isn't usually top of mind while writing web apps, at least it isn't for me. Josh Habdas talks about how to tell if you are invisible to Google, and what to do about it.