Jquery UI droppable's hoverClass in not firing in mobile device -

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i using jquery ui draggable , droppable achieve output http://www.casetify.com/design. here link of page. working expected in desktop width, not working in mobile emulation/device.

on 3rd step of page, when image dragged sidebar mobile cover, droppable's hoverclass fired. hoverclass not getting fired in mobile emulation/device. gets fired when mouse pointed in bottom right of droppable area. below code draggable , droppable element.

$('#image-pool-list img.dddraggable').draggable({   revert: "invalid",   helper: "clone",   //appendto: "body",   //zindex: 100,   live: true,   refreshpositions: true,   drag: function(event, ui) {     $(ui.helper).css('opacity', '0.5');     $('div.design-template').css('opacity', '1');     ui.helper.css({       'width': '90px',       'height': '90px'     });     //console.log(ui.helper);   },   stop: function(event, ui) {     //$('div.design-template').css('opacity','0.2');   } });  $("div#template div.design-template div.placeholder").droppable({   hoverclass: "drop-hover",   tolerance: 'fit', });

so please let me know, how hoverclass triggered in mobile emulation/device if mouse pointer in center poistion.

suppose problem not hoverclass actual problem scalefactor.

$('#image-pool-list img.dddraggable').droppable({         revert: "invalid",         helper: "clone",         live: true,         refreshpositions: true,         start: function( event, ui ) {                scalefactor = 0.6;                click.x = event.clientx;                click.y = event.clienty;         },         drag: function( event, ui ) {               $(ui.helper).css('opacity','0.5');               $('div.design-template').css('opacity','1');               var zoom = 0.6;               var original = ui.originalposition;                ui.position = {                      left: (event.clientx - click.x + original.left) / zoom,                      top:  (event.clienty - click.y + original.top ) / zoom               };         },         stop: function( event, ui ) {                $('div.design-template').css('opacity','0.2');                click.x = 0;                click.y = 0;         } });

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