React: Key learning touch points

React itself is a powerful framework including a number of key techniques:

• Higher Order Components and 
• Children to solve prop-drilling
• Portals - modal story
• React Suspense and lazy: https://hackernoon.com/magic-of-react-suspense-with-concurrent-react-and-react-lazy-api-e32dc5f30ed1

Redux:

• Saga's versus thunks... or both?
• Global versus local state... are you over-using redux?

Other learning:

• Remember that setState() can also take a function as a parameter:
this.setState((prevState, props) => ({ ...prevState, answer}));
• setState() is asynchronous, if you call it in the component you cannot guarantee that local state has been updated immediately