Codes not working

Hi I’ve been practised from the Learn React: Hands-On Guide to Building Web Applications Using React and Redux (2nd Edition).
I am currently viewing the chapter 3 on the component. When I try to follow through and see the output on browser nothing seems appear. Any idea why? I’m a starter, please bear with me.

Here is my code:

    class HelloWorld extends React.Component { render() { return
    <p>Hello, componentized world!</p>  } } ReactDOM.render(
    </div>, document.querySelector("#container"));

Hi Ramzy - welcome to the forums! :slight_smile:

Can you post your full code? I’m only seeing bits and pieces in the response. Also, if you bring up your browser developer tools, do you see any error showing up?