Use useId to match the component to complete the activation #736

[NovaAstra]

1. I have an old SPA project, which only has client-side rendering

2. I want to gradually complete the migration to support server-side rendering, so I extracted a part of the large block components (not pages here) and used renderToString to return from the server

3. renderToString and createSSRApp provide me with such functions

4. But I don't want to createSSRApp to create an instance of each component and mount it to the original block component container element when the client is hydrated

5. Can you provide a more basic API, use useId matching, and activate specific block components on the createSSRApp root instance

6. 我存在一个古老的SPA项目，单纯的只有客户端渲染

7. 我想逐步完成迁移以支持服务端渲染，所以我将一部分大的区块组件（这里不是页面）抽离出去，使用了renderToString 从服务端返回

8. renderToString 和 createSSRApp 提供了我这样的功能

9. 但是我不想在客户端水合的时候每个组件都去 createSSRApp 创建实例挂载到原来的区块组件容器元素上

10. 是否可以提供一个更基础的API，使用useId 匹配，在createSSRApp 根实例上激活特定的区块组件

[edison1105]

使用 lazy-hydration 做不到吗？https://vuejs.org/guide/components/async.html#lazy-hydration