scroll - jQuery Draggable - Scrolling containers other than its own with -


so have unordered list of draggables want drag unordered list of droppables. if clone draggable , append "body", can drag out of container , drop on droppable elements in other list, not automatically scroll through droppable unordered list. if clone , append other unordered list, automatically scroll droppable list, element not visible when dragging until hovering on droppable list. know of workaround or better approach problem?

fiddle code here: https://jsfiddle.net/bkfxjnom/6/ draggable code: 

$('.draggable').draggable({     helper: 'clone',     appendto: "body",     zindex: 100,     refreshpositions: true,     revert: 'invalid',     start: function(event, ui) {       $(this).css('visibility', 'hidden');     },     stop: function(event, ui) {       $(this).css('visibility', 'visible');     }   });

droppable list html:

 <ul class="list-group" id="root" style="overflow-y:scroll; height: 150px">      <li class="list-group-item category-droppable" id="level1">       <span class="glyphicon glyphicon-chevron-right"></span>firstlvl       <ul class="list-group" id="level1">          <li class="list-group-item category-droppable" id="level2">           <span class="glyphicon glyphicon-chevron-right"></span>secondlvl           <ul class="list-group" id="level2">              <li class="list-group-item category-droppable" name="a" id="level3">a</li>+++ many li elements            </ul>         </li>        </ul>     </li>    </ul>

thanks in advance!

so workaround ended using append clone container wanted scrollable, containing there. made clone offset on drag mouse, of positioned absolutely. sort of hacky solution, works. 

                $('.draggable').draggable({                     scrollsensitivity: 35,                     scrollspeed: 28,                     containment: "#root",                     helper: "clone",                     appendto: "#root",                     zindex: 5000,                     refreshpositions: true,                     start: function (event, ui) {                         parent = $(this);                         $(this).css('visibility', 'hidden');                         $(ui.helper).css('visibility', 'hidden');                         clone = $(this).clone();                         clone.addclass("ui-draggable-dragging");                         clone.css('visibility', 'visible');                         clone.css("position", "absolute");                         clone.css("z-index", 5001);                         clone.prependto($(".dragging-area"));                         $("#unprocessed_list").droppable("disable");                     },                     stop: function (event, ui) {                         clone.animate($(this).offset(), 500);                         settimeout(function () { clone.remove(); parent.css('visibility', 'visible'); }, 500);                         $("#unprocessed_list").droppable("enable");                      },                     drag: function (event, ui) {                         clone.offset({ top: event.pagey - clone.height(), left: event.pagex - clone.width()/2 });                     }                 });

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