Include an example of how to handle "runInNewContext: false" with store modules

[jazoom]

What problem does this feature solve?

It is not immediately apparent that each store module needs to be a function that returns a fresh module, which needs to be combined with other store modules when the root store is created afresh.

The above sentence is really confusing. See discussion here to understand what I mean:

https://forum.vuejs.org/t/debugging-state-pollution-with-the-new-behaviour-of-vue-2-3-ssr/11724

What does the proposed API look like?

This is a documentation suggestion.

[ktsn]

You need this section? https://vuex.vuejs.org/en/modules.html#module-reuse

[jazoom]

Well, I don't need anything at the moment. @LinusBorg helped me to find out this was what I was missing and we thought it might be a good idea to add it to the documentation.

[ktsn]

I mean there is a better approach to reuse store modules now (since Vuex v2.3) and it seems to be already documented.

[jazoom]

Then maybe there should be a mention there that this is what is required for SSR to function properly when using runInNewContext: false? I still don't understand why this is better, though.