What is the minimum definition of a Component ?

The minimum definition of a React component is a JavaScript function or class that can accept an arbitrary input (known as props, short for "properties") and returns a React element that describes what should appear on the screen. In its simplest form, a functional component in React can be written as:

function MyComponent(props) {
  return <div>Hello, {props.name}!</div>;
}

This function is a valid React component because it accepts a single "props" (which stands for properties) object argument with data and returns a React element. Here, MyComponent is a functional component that takes props as an argument and returns a simple JSX element that renders a div with the text "Hello," followed by the value of props.name.

Alternatively, a React component can also be defined as a class that extends React.Component:

class MyComponent extends React.Component {
  render() {
    return <div>Hello, {this.props.name}!</div>;
  }
}

In this class component, MyComponent extends React.Component and implements a render method that returns a React element, which is...