title: Get element by a specific data attribute
body: <p>Is there a way to grab a whole element by one of its data attributes via javascript or jQuery? Say i have a link somewhere on a website like this</p>
  
  <p><code>&lt;a href="http://www.google.com/" data-source="google"&gt;Google&lt;/a&gt;</code></p>
  
  <p>Since the link above doesn't have any id or class i cannot grab it by that. I need to get it by its <code>data-source</code> attribute. So say i could somehow with jQuery get the value of a attribute with the name of <code>data-source</code>. How would i do that ?</p>