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ztree 父级树选中时-绑定事件-全选子树
$(document).ready(function(){
//初始化树
zTree = $.fn.zTree.init($("#treeSelect"), setting, datas);
});
//setting中加入
callback: {
onClick: function (e, treeId, treeNode, clickFlag) {
zTree.checkNode(treeNode, !treeNode.checked, true);
}
},