script.aculo.us 拖放贪婪选项

这个 script.aculo.us Drag & Drop greedy Option 用于停止处理悬停在其他 droppable 下，在 drag-gable 下不会被搜索。此选项的默认值为 true，这意味着放置区域将接受可拖动元素 false 不会。

句法：

Droppables.add('element', {greedy: false or true});

例子：

  

    
    
      
    
    
      
    
        window.onload = function () {
  
            $A($('draggables').getElementsByTagName(
                'img')).each(function (item) {
                    new Draggable(
                        item, { revert: true, ghosting: true });
                });
  
            Droppables.add(
                'droparea', {
                    hoverclass: 'hoverActive',
                greedy: false, onDrop: moveItem
            });
  
            // Set drop area default non cleared.
            $('droparea').cleared = false;
        }
  
        function moveItem(draggable, droparea) {
            if (!droparea.cleared) {
                droparea.innerHTML = '';
                droparea.cleared = true;
            }
  
            draggable.parentNode.removeChild(draggable);
            droparea.appendChild(draggable);
        }
    
  
    
        #draggables {
            width: 550px;
            height: 73px;
        }
  
        #gfg {
            width: 550px;
            height: 73px;
        }
  
        #droparea {
            float: left;
            width: 650px;
            height: 90px;
            border: 2px solid gray;
            text-align: center;
            font-size: 16px;
            padding: 12px;
        }
    

  

    
        
            GeeksforGeeks
        
          
        A Computer Science Portal for Geeks
    
  
    
        script.aculo.us Drag & Drop
        greedy Option
    
      
    
        
        
    
      
    
        Drag the Image and Drop Your 
        Image in this area
    

  

输出：

• 拖放之前：
  
• 拖放后：放置区域将不接受该元素。