index.html

<html>
    <head>
        <title>React Minus NPM</title>
        <script src="/js/react.16.0.0.min.js"></script>
        <script src="/js/react-dom.16.0.0.min.js"></script>
    </head>
    <!--based on the tutorial found at: https://medium.com/@clmyles/react-without-npm-babel-or-webpack-1e9a6049714 -->
    <body>
        <div id="root"></div>

        <script>
            window.onload = function()
            {
                class HelloWorld extends React.Component
                {
                    render()
                    {
                        return React.createElement('h1', null, 'Hello World, ' + this.props.greeting);
                    }
                }
                ReactDOM.render(
                    React.createElement(HelloWorld, { greeting : 'I\'m back!' }),
                    document.getElementById('root')
                );
            };
        </script>
    </body>
</html>