Posts (1) in December 2015:

Not as you'd expect: how React persists state across renders

12/11/2015
A few months ago we released a new version of our checkout page, one of the first Big Projects we’ve built with React. The ability to power the views by state makes it easy to reason about the various flows and has drastically improved our ability to make changes on the page. We ran into some problems when we accidentally reused the form state across multiple inputs because of how React compares virtual DOM renders. Read more