how to render a react component using ReactDOM Render
<pre><code>_Header (cshtml) 

&lt;div id="Help"&gt;&lt;/div&gt;


export default class Help {
    ReactDOM.render(     
           &lt;Help/&gt;,
           document.getElementById('Help')        
        );
}

Help.js (component)


}
</code></pre>

<p>My goal is to render a help button on header.</p>

<p>I've Created div tag with id help-modal , and a 
component rendering help button. I am connection those two in help.js
 by ReactDOM.render(.........);
    when I do npm run dist and dotnet run , and see the browser 
I couldn't see the button on header . Can any one help on this please ??</p>