ZTREE DEMO - beforeExpand / onExpand && beforeCollapse / onCollapse

1, 'beforeCollapse / onCollapse'
'beforeExpand / onExpand' callback function
- Use 'beforeCollapse / onCollapse' and 'beforeExpand / onExpand' callback function can control whether to allow expand or collapse the parent node . This simple demo shows how to monitor the collapse and expand event.
- Try:
       Whether trigger the callback when execution expandNode() method.
      Single Node --[ expand ]     [ collapse ]     [ toggle ]
      Single Node (including child) --[ expand ]     [ collapse ]
      All Nodes --[ expand All ]     [ collapse All ]
- How to use zTreeObj.updateNode method, please see the API documentation.
  collapse / expand log:
2, Explanation of setting
- Set attributes about 'setting.callback.beforeCollapse / onCollapse / beforeExpand / onExpand', please see the API documentation for more related contents.
- If you need to adjust the expand / collapse animation effects, please see the API documentation about setting.view.expandSpeed.
3, Explanation of treeNode
- No special requirements on the node data, the user can add custom attributes.

Control of Expand Node