React Components

We can organized groups of elements into React components.

A basic function component is written similarly to a regular JavaScript function with a couple of differences.

• Component names must start with a capital letter (that is, MyComponent, instead of myComponent)
• Components, unlike JavaScript functions, must return JSX.

Here is the basic syntax of a React function component:

function App() {
  return (
     <div>Hello world!</div>
  );
}