vue3 el-tree-select change方法

Vue3中的el-tree-select组件的change方法可以使用以下代码实现：

change(selectTree) {
  // 判断是否选择了某个节点
  if (selectTree.value.length > 0) {
    // 获取选择的节点ID
    const selectedNodeId = selectTree.value<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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