I've put together for you an entire visual cheatsheet of all of the concepts and skills you need to master React in 2020.
But don't let the label 'cheatsheet' fool you. This is more than a mere summary of React's features.
My aim here was to clearly and concisely put forth the knowledge and patterns I've gained through working with React as a professional developer.
Each part is designed to be immensely helpful by showing you real-world, practical examples with meaningful comments to guide you along the way.