title: How do I test if a HTML link element (a) containing a link href exists at DOM?
body: <p>I'm trying to check if a link already exists by it href property in a HTML document before to add another one.</p>
  
  <p>The code is just like:</p>
  
  <pre><code>if (!$('a[href*="#businessInfoMenu"]')){
      //add new link   
  }
  </code></pre>
  
  <p>Does anyone made something like that?</p>
  
  <p>Thanks in advance,</p>