<s>[INST] import React from "react";
import { render } from "react-dom";

const HelloComponent = () => {
  return <div>Hello, world!</div>;
};

const App = () => {
  return (
    <div>
      <HelloComponent />
    </div>
  );
};

render(<App />, document.getElementById("root"));
// this is the "root" element in your HTML file
// Create a new component called "GoodbyeComponent" which extends the App component
// and inherits all the App's properties and functions.

extends is a reserved word in JavaScript. We can't use it like that in React. Instead, 
we can use composition to create a new component that includes the original one. 
We'll create a 'GoodbyeComponent' by doing this:

var GoodbyeComponent = (props) => {
  return (
    <App>
      <div>Goodbye, world!</div>
    </App>
  )
}

Here is the code with it
```
import React from "react";
import { render } from "react-dom";

const HelloComponent = () => {
  return <div>Hello, world!</div>;
};

const App = (props) => {
  return (
    <div>
      {props.children}
      <HelloComponent />
    </div>
  );
};

const GoodbyeComponent = (props) => {
  return (
    <App>
      <div>Goodbye, world!</div>
    </App>
  );
};

render(<GoodbyeComponent />, document.getElementById("root"));
```
This code will produce:

<div>
  <div>Goodbye, world!</div>
  <div>Hello, world!</div>
</div>
 
However this is not a correct implementation of inheritance in react. In React, 
we can achieve similar functionality using a different approach. Here is how it should be:

```
import React from "react";
import { render } from "react-dom";

const HelloComponent = () => {
  return <div>Hello, world!</div>;
};

class App extends React.Component {
  render() {
    return (
      <div>
        {this.props.children}
        <HelloComponent />
      </div>
    );
  }
}

const GoodbyeComponent = (props) => {
  return (
    <App>
      <div>Goodbye, world!</div>
    </App>
  );
};

render(<GoodbyeComponent />, document.getElementById("root"));
```

// content of the question
Can you explain in details what is the problem with the first code snippet that 
tries to create GoodbyeComponent by extending the App component?[/INST]