In my coding i have a html file in wwwroot with following codes.

```
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>sample1</title>
    <script src="/Sample.js"></script>
</head>
<body>
    <h2>Sample1</h2>
<div id="combo1"></div>
</body>
</html>

```

and my Sample.js file contains follwing

```
export class CommentBox extends React.Component {
    render() {
        return (
            <div className="commentBox">Hello, world! I am a CommentBox.</div>
            <h2>hey hello</h2>
        );
    }
}

ReactDOM.render(<CommentBox />, document.getElementById('combo1'));

```

But i dont get the render element ...

anyone guide me ..

Thanks in adavance