title: How can I get `data-value` using jQuery?
body: <p>How can I get <code>data-value</code> country using jQuery? I need this in variable:</p>
  
  <pre><code>var country = ...;
  </code></pre>
  
  <p>HTML:</p>
  
  <pre><code>&lt;a id="obj-details" data-value="{city:'berlin', street: 'mozart', postal_code: '55555', country: 'DE'}"&gt;test&lt;/a&gt;
  </code></pre>