title: About Infinite Scroll in React.js and Material_ui
body: <p>I am on the project with react.js</p>
  
  <p>For the project, I am supposed to include board with infinite scroll like Facebook</p>
  
  <p>In that, I have a question.</p>
  
  <p>When I scroll the board and recall more post like Facebook, is it working </p>
  
  <p>whether it draws only additional posts under the bottom of post or</p>
  
  <p>it recalls the whole list and redraws it</p>
  
  <pre><code>ex) case 1 :  {1,2,3} &gt; scroll &gt; {1,2,3} + {4,5} (additional posts)
      case 2 :  {1,2,3} &gt; scroll &gt; {1,2,3,4,5} (whole posts)
  </code></pre>
  
  <p>if I do case 1, I wanna know-how.</p>
  
  <p>Thanks!</p>