javascript - CKEDITOR: How to add additional input to image upload form -


i spent whole day trying add additional input image upload form in ckeditor dialog. need send value through post when image uploaded. i've tried add input manualy of course doesn't work. ideas?

here javascript

        ckeditor.on('dialogdefinition', function(ev) {             var dialogname = ev.data.name;              var dialogdefinition = ev.data.definition;                if (dialogname == 'image') {                     dialogdefinition.onshow = function () {                          var dialog = ckeditor.dialog.getcurrent();                         var element = dialog.getelement();                         var iframe = $(element).find('iframe.cke_dialog_ui_input_file');                         var form = iframe.contents().find('form');                         form.append('<input type="hidden" name="addinput" value="myvalue">');                     };                  }          });


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