fix: Adding missing field to store #101
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nzakas
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May 13, 2025
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| const storedValue = searchParams.get(key) ?? ""; | ||
| const storedValue = getHashParams().get(key) ?? ""; | ||
| return storedValue ? JSON.parse(atob(storedValue)) : ""; | ||
| }, | ||
| setItem: (key, newValue): void => { | ||
| const searchParams = new URLSearchParams(location.hash.slice(1)); | ||
| const searchParams = getHashParams(); | ||
| const encodedValue = btoa(JSON.stringify(newValue)); | ||
| searchParams.set(key, encodedValue); | ||
| location.hash = searchParams.toString(); | ||
| }, | ||
| removeItem: (key): void => { | ||
| const searchParams = new URLSearchParams(location.hash.slice(1)); | ||
| const searchParams = getHashParams(); |
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This looks like we're creating a new URLSearchParams for each method. Is that necessary or can the same one be reused?
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Yes, it is necessary to create a new URLSearchParams. If we reused a single URLSearchParams instance, it would contain stale data that doesn't reflect the current state of location.hash.
nzakas
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nzakas
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May 14, 2025
lumirlumir
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@amareshsm should we remove the dropdown change case then? I can send a PR for that? |
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Prerequisites checklist
What is the purpose of this pull request?
What changes did you make? (Give an overview)
Use the
onRehydrateStoragehook to add any new field if it is missing in the store.The previous implementation - #97, where we checked for missing language code, works fine in cases where a user manually selects a new language from the dropdown. In this scenario, if the corresponding code entry was missing, we could dynamically patch it on the fly.
However, this approach breaks when a user opens a shared link that points directly to a newly added language. Since the state is rehydrated from the URL hash and doesn’t include the new language (because it wasn’t present in the original persisted state), the app can break.
We’re now using the onRehydrateStorage hook provided by Zustand. This hook ensures that immediately after the state is loaded from storage, any missing fields (like code for a new language) are automatically added using defaultCode. This centralises the patching logic inside the store (use-explorer file), ensures the state is always complete, and prevents issues with incomplete or outdated persisted data.
Also, all code logic related to state hydration and defaults stays cleanly inside the Zustand store.
Related Issues
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