Why is it recommended to Fragment elements? What’s the short for it?

Avoid producing unnecessary DOM elements

How do YOU listen for state changes in React?

When setState is called, the component listens for state changes and renders the new page with the new statte state

React What is a stateful component?

A component that needs to maintain its own data state is a stateful component

How do React V15 handle error boundaries?

React15 has a method for handling error boundaries: unstable_handleError

React why not just change the state? If you want to modify how to do?

React will render after multiple state updates

What are the benefits of create-React-app?

Create-react-app helps developers reduce unnecessary repetitive work, including the default project directory as well as dependency modules and packaging tools