Feature request: add a functional version of the example code

With the increasing adoption of functional components and React hooks (including now its support in recent versions of the Expo SDK) it would be great if the there's an option to view a functional version of the code examples in the documentation.
(Such as in this page, at the bottom: https://reactnative.dev/docs/next/backhandler)
More and more projects no longer use class-based components and the conversion can troublesome specially for less experienced developers.
Note: I'm using version 4 of the docs

從 issue 中連結的 BackHandler 文件頁面開始，查看其中的範例程式碼及周圍的文件。完成的標準是，相關文件在現有的類別版本旁邊提供一個使用 functional-components 和 hooks 的範例版本。