How to keep the current page/view when lazy loading?

I do not know whether it is possible to instruct Suspense to use the current page/view as the fallback component until the next view is ready to be rendered.

Indeed, in order to achieve YouTube or GitHub like loading with a top linear progress bar on the current view, we need a way to instruct the Suspense component to not unmount the current view straight away or to just add an additional child component to the current view.

The documentation would benefit from adding such example, as this behaviour is now the industry norm and it greatly improves the UX. As on StackOverflow and other relevant forums no one seems to know how to do:
https://stackoverflow.com/questions/55669865/is-it-possible-to-keep-the-current-component-mounted-as-the-fallback-content-f
https://stackoverflow.com/questions/57741868/how-can-react-suspense-remain-on-the-same-page-lazyloading

However, I am not sure this is possible right now, and if not putting it on the backlog as a new feature will be useful.

首先查看 issue 中描述的 Suspense 行為以及連結的兩場討論，以確定目前的檢視畫面在 lazy loading 期間是否可以保持掛載。如果可能，請透過 loading 範例記錄受支援的行為；否則請明確說明目前無法提供所要求的 fallback 行為。