Polyfill React 16.3 New Lifecycle Hooks (youtube.com)
Apr 12, 2018
In this video we’ll look at how to bring backwards compatibility when using the new React 16.3 lifecycle hooks. The react-lifecycles-compat polyfill will allow the getDerivedStateFromProps and getSnapshotBeforeUpdate methods to work in older versions of React.
What's New in React 16.3.0 (youtube.com)
Mar 30, 2018
In this video we’ll look at "what's new" in React version 16.3. It turns out there are a lot of new features packed in this release. There is a new Context API, some new ref APIs, new and updated lifecycle methods, a new strict mode component, an experimental async mode component, and an updated version of React DevTools.