text:     // Class definition
      var KTQuilDemos = function() {
  
          // Private functions
          var demo1 = function() {
              var quill = new Quill('#kt_quil_1', {
                  modules: {
                      toolbar: [
                          [{
                          header: [1, 2, false]
                      }],
                      ['bold', 'italic', 'underline'],
                      ['image', 'code-block']
                  ]
              },
              placeholder: 'Type your text here...',
              theme: 'snow' // or 'bubble'
          });
      }
  
      var demo2 = function() {
          var Delta = Quill.import('delta');
          var quill = new Quill('#kt_quil_2', {
              modules: {
                  toolbar: true
              },
              placeholder: 'Type your text here...',
              theme: 'snow'
          });
  
          // Store accumulated changes
          var change = new Delta();
          quill.on('text-change', function(delta) {
              change = change.compose(delta);
          });
  
          // Save periodically
          setInterval(function() {
              if (change.length() > 0) {
                  console.log('Saving changes', change);
                  /*
                  Send partial changes
                  $.post('/your-endpoint', {
                    partial: JSON.stringify(change)
                  });
  
                  Send entire document
                  $.post('/your-endpoint', {
                    doc: JSON.stringify(quill.getContents())
                  });
                  */
                  change = new Delta();
              }
          }, 5 * 1000);
  
          // Check for unsaved data
          window.onbeforeunload = function() {
              if (change.length() > 0) {
                  return 'There are unsaved changes. Are you sure you want to leave?';
              }
          }
      }
  
      return {
          // public functions
          init: function() {
              demo1();
              demo2();
          }
      };
  }();
  
  jQuery(document).ready(function() {
      KTQuilDemos.init();
  });
  