title: React Model sticky header
body: <p>I am using <a href="https://www.npmjs.com/package/react-model" rel="nofollow noreferrer">react-model</a> npm package </p>
  
  <p>here is the link of my <a href="https://codepen.io/mkhq/pen/qGgjXv" rel="nofollow noreferrer">codepen</a>
  if you check there is button close modal I want to make that button sticky</p>
  
  <pre><code>&lt;button onClick={this.handleCloseModal}&gt;Close Modal&lt;/button&gt;
  </code></pre>
  
  <p>Button should not scroll with text
  <a href="https://i.stack.imgur.com/YB5HU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YB5HU.png" alt="enter image description here"></a></p>