jquery - Drag and drop - not drop out of droppable -


i have project drag , drop + clone + resizable, far i've managed right. can clone element , element can resized (resizable)

however, problem :
clone elements , game area droppable , may leave area , stay droppable across screen (they can cloned when game element droppable area after being cloned can dragged around screen)
wonder if there's way make can dragged within droppable area, can not leave droppable

ps: sorry if english wrong, i'm using google translator..

if using jquery-ui possible. use containment selector on area. check example more information.


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