jQuery event sample

events.js

$(document).ready(function() {
  $(document)
  .on(
    'ajax:before',
    'form.single-line-qualification',
    function(e) {
      if (e.target[1].value.trim() === '') {
        e.target[1].value = '';
        alert('You must enter a name!');
        return false;
      }
    }
   )
   .on(
    'ajax:success',
    'form.single-line-qualification',
    function (data, status, xhr) {
      // insert the data returned into the page
      $('#articles').append(data);
    }
  );
});