Missing example for keyless context created with `createContext()`

[andyearnshaw]

The context examples only cover the basic getContext() and setContext() API. There's no example for the type-safe createContext() API:

import { createContext } from 'svelte';

export const [getUserContext, setUserContext] = createContext<User>();

These context functions don't use a key, so the context: Map([[<key>, <value>], ...]) approach doesn't seem to be appropriate. I'm just getting to grips with Svelte testing, so I'm not sure how to do this myself yet. If I figure it out then I may open a PR.

[mcous]

Oh cool, I hadn't seen this new context API! I'd def appreciate a PR to update the examples once you get a handle on it.

Let me know if I can answer any questions about the existing examples docs

[andyearnshaw]

Thanks. I've discovered that there's no straightforward way to apply this kind of context using the mount() or render() functions. There's an open issue about this on the Svelte tracker and an open pull request to address it.

I do have a workaround, but I'll hold off adding that as an example right now until I see some discussion on that PR. If it gets merged quite soon then the example here will look much simpler.