T
tRPC

Best practices for implementing an offline application

Best practices for implementing an offline application

MMiNiMAL
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10/11/2022
Hey there! I'm building a full stack react-native app with Expo and a tRPC backend. I'd like for this app to be functional offline. Currently I'm accomplishing this via a simple optimistic update like: 
const createUser = trpc.userCreate.useMutation({
        onMutate: async () => {
            // Cancel users fetch
            await utils.users.cancel()
            // Get current users list
            const previousData = utils.users.getData() || []
            // Append new user
            utils.users.setData([...previousData, { id: uuid.v1(), name } as User])
            return { previousData }
        },
    })
const createUser = trpc.userCreate.useMutation({
        onMutate: async () => {
            // Cancel users fetch
            await utils.users.cancel()
            // Get current users list
            const previousData = utils.users.getData() || []
            // Append new user
            utils.users.setData([...previousData, { id: uuid.v1(), name } as User])
            return { previousData }
        },
    })
This is working pretty well (it's late and I plan on extensively testing this tomorrow). I'd like to confirm what best practices, if any, have been established by the community before continuing.
UUUnknown User
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10/12/2022
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tRPC

Best practices for implementing an offline application

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