title: Pass :after content attribute with html attribute
body: <p>I have a number of <code>div</code>'s, each needing a different content attribute in the <code>:after</code> element.
  It is not possible for me to style each div individually, because the amount of <code>div</code>'s is rather large.</p>
  
  <p>My question: Can I pass the attribute in the html tag itself?
  Say I have</p>
  
  <pre><code>&lt;a href="#" class="vak"&gt;Engels&lt;/a&gt;
  </code></pre>
  
  <p>With an <code>:after</code> styling like </p>
  
  <pre><code>content: "this needs to change";
  display: inline-block;
  color: #A9B0BB;  
  float: right;
  font-style:italic;
  </code></pre>
  
  <p>How can I pass on the <code>this needs to change</code> string in html? Is there a better way to do this? (preferably without using js)</p>