feat(docs): document how to setup traditional web modals

[expo]

feat(docs): document how to setup traditional web modals

[Albert-Gao]

Everything below is ONLY for the web, the mobile modal pattern is solved at the OS layer

Hi, would love to help, but wonder what is the suggested solution, my quick idea is to solve this from the expo-router layer, which is, when you have a screen with option { presentation: "modal" }, and you link.push() to this screen,

• the expo-router would render this screen with portal from the root.
• the path should not update to the modal path which would re-render the whole page and thus breaking the web-pattern (display the current page underneath the grayed-out background), it should just attach a query string maybe. (or it can?)

Then you can have a proper web-like modal for free and integrates with the expo-router default API.

The tricky part might be the grayed-out background, do we need to have a way to let the user reuse it, or let the user solve it at the user-land since with the above pattern, it is just a matter of implementation.

[EvanBacon]

Closing in favor of an internal linear ticket for our docs team. This should be pretty easy to do with Expo Router v3.

[yepes]

Any example of this use case?