VUE3 + Elementui-Plus 之树形组件el-tree 一键展开（收起）；一键全选（不全选）

需求：产品要求权限树形结构添加外部复选框进行全部展开或收起；全选或不全选。

实现步骤：
tree组件部分：

<div class="role-handle">
   <div>权限选择(可多选)</div>
   <div>
     <el-checkbox v-model="expandAll" @change="toggleExpandAll"> 展开/折叠 </el-checkbox>

     <el-checkbox v-model="checkAll" @change="handleCheckAllChange"> 全选/全不选 </el-checkbox>
   </div>
 </div>
<el-tree
   ref="treeRef"
   node-key="code"
   show-checkbox
   v-loading="loading"
   element-loading-text="权限资源加载中..."
   class="el-tree"
   :indent="12"
   :data="treeData"
   :props="defaultProps"
   :highlight-current="true"
   :default-expand-all="false"
   :expand-on-click-node="false"
   :default-checked-keys="menuIds"
   :default-expanded-keys="expandedKeys"
   @check="handleCheckChange"
 />

ts部分：

const checkAll: any = ref(false);
const expandAll: any = ref(false);
//略去其他变量；可查看文档自行配置
// 展开
const toggleExpandAll = (type: any) => {
  expandAll.value = type;
  if (type) {
    Object.values(treeRef.value.store.nodesMap).forEach((v: any) => v.expand());
    return;
  }
  Object.values(treeRef.value.store.nodesMap).forEach((v: any) => v.collapse());
};
// 全选
const handleCheckAllChange = (val: any) => {
  setCheckedRecursive(treeData.value, val);
};
const setCheckedRecursive = (nodes: any, checked: any) => {
  for (const node of nodes) {
    treeRef.value.setChecked(node.code, checked);
    if (node.child && node.child.length > 0) {
      setCheckedRecursive(node.child, checked);
    }
  }
};