summernote

      jQuery('#summernote4').summernote({
          callbacks: {
            onImageUpload: function(files) {
                for(let i=0; i < files.length; i++) {
                    sendFile4(files[i]);
                }
            }
        },
      });
      function sendFile4(file) {
          data = new FormData();
          data.append('file', file, file.name);
          jQuery.ajax({
              data: data,
              type: "POST",
              xhr: function() {
                  var xhr = new window.XMLHttpRequest();
                  xhr.upload.addEventListener("progress", function(evt) {
                      if (evt.lengthComputable) {
                          var percentComplete = (evt.loaded / evt.total)*100;
                          console.log(percentComplete);
                          var x = document.getElementById("snackbar");
                          x.className = "show";
                          jQuery('#snackbar').text(Math.round(percentComplete)+' % complete');
                          if(percentComplete==100)
                          {
                            setTimeout(function(){ x.className = x.className.replace("show", ""); },3000);
                          }
                      }
                 }, false);

                 xhr.addEventListener("progress", function(evt) {
                     if (evt.lengthComputable) {
                         var percentComplete = evt.loaded / evt.total;
                         console.log(percentComplete);
                     }
                 }, false);

                 return xhr;
              },
              url: "<?php echo base_url('summer-image');?>",
              cache: false,
              contentType: false,
              processData: false,
              success: function(img) {
                console.log(img);
                jQuery('#summernote4').summernote('insertImage', img);
              },
              error: function (jqXHR, textStatus, errorThrown) {
                console.error(textStatus + " " + errorThrown);
              }
          });
      }