Uncaught referenceerror: react is not defined

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Error Reference: uncaught referenceerror: react is not defined

Explanation:

This error occurs when the React library is not properly imported or referenced in your JavaScript code. React is a JavaScript library used for building user interfaces, and it needs to be included and available in the current scope for your code to work.

Example code:


    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>React Example</title>
    </head>
    <body>
    
    <div id="root"></div>
    
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.8.6/umd/react.production.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.8.6/umd/react-dom.production.min.js"></script>
    
    <script>
        // This will throw an error since React is not defined
        ReactDOM.render(<h1>Hello React</h1>, document.getElementById('root'));
    </script>
    
    </body>
    </html>

In this example, the React library is included using two script tags that fetch the React and ReactDOM files from a CDN (Content Delivery Network). However, the error occurs because the ReactDOM.render method is called before the React library is available. To fix this error, make sure to include and import the React library prior to using any React-specific code.

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