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PWA form submission data stored locally

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Posted on by timeless

I have started working with my Power App Portal as a PWA. That says that offline for submissions will not work and that makes sense. Is there a way I can redirect that to instead of just doing nothing to save that data locally (indexdb, localstorage whatever)? We want to be able to still collect simple data submissions offline and then push those when connection is restored.

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Power Apps portals

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Christian Leverenz 1,214 on at

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Hi @timeless ,
we did this before in a kind of prototyping. We just intercepted (in the serviceworker) the postcall and in case of no network we stored the values locally somewhere (i think, we used indexdb with an additional helperlibrary, not sure).
When the network was back, we just posted the content again. Thsi worked for logged in and anonymous users.

I haven't tested the pwa features yet but as there are now apis available i would store the values of the fields (can be relatively easily gathered from the form) and then passing them over to the api in case the network ist back.
But as i said: this is just the idea, haven't tried it but in former versions it worked already for us (unfortunately i am not allowed to share the code, may be i or somebody else shod write a little bit about it 🙂 )

Hope this helps (even if it is not the solution already),
Christian

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timeless 8 on at

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Thanks for the response!

Any tips or issues on running indexdb?

Which APIs were you referring to?

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Christian Leverenz 1,214 on at

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Hi @timeless ,
the apis of portals are described here: https://docs.microsoft.com/en-us/powerapps/maker/portals/web-api-overview . Sometimes a little bit clumsy to use (especially lookups are, well, challenging).
I have no special tips or recommendations on indexdb. It was just prototyping and no idea, whether this approach would have gone to production. We used https://github.com/jakearchibald/idb-keyval , but i am not sure whether this is production ready.

Hope this helps,
Christian

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