title: short / detailed buttons
body: <p>How to implement two buttons, "short" and "detailed"? "short" should be the default and show one version of the page. Upon clicking the "detailed" button, another version of the page should be showed.</p>
  
  <p>Since this is a bit difficult to explain, perhaps see the example below.</p>
  
  <p>example page:</p>
  
  <ul>
  <li>never mind the contents</li>
  <li>requires javscript</li>
  <li><a href="https://www.klimafakten.de/behauptungen/behauptung-aber-am-suedpol-nimmt-die-eismasse-zu" rel="nofollow">https://www.klimafakten.de/behauptungen/behauptung-aber-am-suedpol-nimmt-die-eismasse-zu</a></li>
  <li>Scroll down a bit.</li>
  <li>Check the buttons "Kurz" (stands for short) and "Ausführlich" (stands for detailed).</li>
  </ul>
  
  <p>requirements:</p>
  
  <ul>
  <li>does not totally make content inaccessible without javascript (while noscript is activated)</li>
  <li>works in major modern browsers</li>
  </ul>
  
  <p>ideally:</p>
  
  <ul>
  <li>works without javascript (while noscript is activated)</li>
  </ul>