title: select2 alert selected option when selecting the value
body: <p>In select2 how can I alert the option being selected for a multiple select?</p>
  
  <p>This is my code for trigger when select2 option is being selected:</p>
  
  <pre><code>&lt;script&gt;
      $("#list").select2();
  
      $('#list').on("select2-selecting", function(e) { 
          alert(this.value);
      });     
  &lt;/script&gt;
  </code></pre>
  
  <p>This will only alert the already selected value. Not the option that I am selecting.</p>
  
  <p>I can't also do this:</p>
  
  <pre><code>var test = $('#list').val();
  alert(test);
  </code></pre>
  
  <p>Since it will only alert the already selected options as well.</p>
  
  <p>What I want is to alert the option that is still being selected. So if you click the drop-down and select an option it will alert the value of that option.</p>
  
  <p>The first option is selected by default. Sorry I forgot to mention this</p>