How to append a react.js component into an iframe?

@jerad 

To append a React.js component into an iframe, you can follow these steps:

1. Create a React.js component that you want to append into the iframe. This component can be a simple functional component or a class component.
2. Import the React and ReactDOM libraries in your project.
3. Use ReactDOM.render() method to render your React component inside the iframe. You can access the iframe element using document.getElementById or any other method to get a reference to the iframe element.
4. In your parent component, create an iframe element and give it an id.
5. Inside the parent component, use the ReactDOM.render() method to render your React component into the iframe element. Here is an example code snippet showing how to append a React component into an iframe:

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import React from 'react';
import ReactDOM from 'react-dom';

const MyComponent = () => {
  return <h1>Hello World!</h1>;
};

const MyComponentInIframe = () => {
  const iframe = document.getElementById('my-iframe');
  const iframeDocument = iframe.contentDocument;
  ReactDOM.render(<MyComponent />, iframeDocument.body);
  
  return (
    <iframe id="my-iframe" width="400" height="200"></iframe>
  );
};

In this example, we have created a simple functional component MyComponent and then rendered it inside the iframe element with id 'my-iframe' using the ReactDOM.render() method.

Make sure to adjust the size and styling of the iframe to fit your requirements.