Vue中组件递归嵌套报错解决

[Vue warn]: Unknown custom element: <TreeNode> - did you register the component correctly? For recursive components, make sure to provide the "name" option.

递归式引用组件，比如A组件引用B组件，B组件引用C组件，C组件又引用A组件之类的
解决方案是，将import引入改为components内引入：

components: {
  TreeNode: () => import('./TreeNode.vue')
}