title: how to use css to recover overflow scroll behavior
body: <p>I was wondering what I would need to do with the div#blocker in this code to recover the ability to have overflow in "innermost" be handled with scrolling: <a href="https://jsfiddle.net/39q78tdm/" rel="nofollow noreferrer">https://jsfiddle.net/39q78tdm/</a> .</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>* {
    box-sizing: border-box;
  }
  
  main {
    background: pink;
    height: 400px;
    border: solid;
    overflow: hidden;
  }
  
  container {
    background: yellow;
  }
  
  #wrapper {
    height: 100%;
    overflow: scroll;
  }
  
  #inner {
    background: aqua;
    height: 800px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;main&gt;
    &lt;div id="blocker"&gt;
      &lt;container&gt;
        &lt;header&gt;header in container&lt;/header&gt;
        &lt;div id="wrapper"&gt;
          &lt;div id="inner"&gt;
            innermost
          &lt;/div&gt;
        &lt;/div&gt;
      &lt;/container&gt;
    &lt;/div&gt;
  &lt;/main&gt;</code></pre>
  </div>
  </div>
  </p>