title: hide elements if too small without js
body: <p>I like to hide content, if the window size falls below a minimum size. I found an example (http://css-tricks.com/dynamic-page-replacing-content/), but I could not find out, why it works.</p>
  
  <pre><code>&lt;div class="container"&gt;
      &lt;div class="box left"&gt;foo1&lt;/div&gt;
      &lt;aside class="box right"&gt;foo2&lt;/aside&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>The goal is, if the width of container falls below a specified minimum size aside will be hidden. That should work without javascript, just using css.</p>