element-ui tree数据中根据id查找node

1. 递归返回正确数据
2. 尽早返回

3.  findNode(list, id) {
         let result = null
         for (let i = 0; i < list.length; i++) {
           if (list[i].ID === id) {
             result = list[i]
             console.log('selected', result)
             break
           } else {
             const node = this.findNode(list[i].Children, id)
             if (node != null) {
               result = node
               break
             }
           }
         }
   
         return result
       },