title: jQuery check for empty variable
body: <p>So, I have the following js markup:</p>
  
  <pre><code>jQuery(document).on( 'click', '.rhpcon', function(e) {  
      var rhp_name = jQuery(this).find('.rhi').data("name");
  
      var my_html = '&lt;div class="rhfi"&gt;'+ rhp_name +'&lt;/div&gt;'; 
          my_html += '&lt;div class="something"&gt;Show something else&lt;/div&gt;';                          
      jQuery('.rh_pop').html(my_html);                        
  });
  </code></pre>
  
  <p>As you can see, the <code>rhp_name</code> variable is used in the hardcoded html.</p>
  
  <p>However, there are scenarios where <code>data-name</code> does not exist (ie, no <code>rhp_name</code> variable).</p>
  
  <p>In a scenario where there is no <code>rhp_name</code> variable, I don't want the first <code>my_html</code> line to be used. </p>
  
  <p>How do I check if the <code>var</code> is empty and so on?</p>
  
  <p>Thanks!</p>