react-function-components

Question 1

What is a React component?

Answer 1

they are like JS functions; they accept arbitrary inputs (called “props”) and return React elements describing what should appear on screen

Question 2

How do you define a function component in React?

Answer 2

write a JS function or use ES6 class to define component; components must start with capital letters

Question 3

How do you mount a component to the DOM?

Answer 3

use ReactDOM.render(element,document.querySelector(“#root”))