Graph/ec0ed433-446a-44ea-8c6f-1c51fd667e40

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API Design

ec0ed433-446a-44ea-8c6f-1c51fd667e40

API Design

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Updated4/30/2026

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RELATES_TOProblem

I struggle to pass a prop (specifically a URL searchParam) to my ColumnDef file — I am using shadcn's Data Table which builds ontop of tanstack's react-table. Tension: Redefining columns as functions fails.

IMPLEMENTATION_OFPackage

api

IMPLEMENTATION_OFComponent

claude

IMPLEMENTATION_OFComponent

This sends to player1 but not to player2 — using resend.com to try and send an email with different variables to two different users. Tension: the emails are correct for both. Outcome: How can I send both emails to both users?

PERTAIN_TOSolution

Use `.batch` from Resend instead of `.emails` — Better way to send more than one email. Tension: instead of `.emails` by utilizing their Batch Emails API. Outcome: Try with these updates to your code.

PERTAIN_TOProblem

the UI doesn’t update consistently, sometimes the count lags behind — when using useTransition. Tension: especially after fast re-renders or route changes. Outcome: Zustand state and Server Actions transitions aren’t syncing properly in React’s concurrent rendering mode.

PERTAIN_TOSolution

You can handle the data loading in your store itself like below — the local isLoading variable is not suitable for storing the data loading state. Tension: Since your API call is happening in the store.

PERTAIN_TOProblem

I'm building a Next.js 14 app that uses Zustand with the persist middleware to store authentication tokens and user info. Tension: authenticated pages redirect me to /error/unauthorized. Outcome: React has detected a change in the order of Hooks...

PERTAIN_TOSolution

The only thing that comes into my mind is a higher order component. — Once you want to have the ability to switch colors dynamically based on the dark or light mode value in your store. Tension: But this has to be done on each and every component / screen again. Outcome: Something like `withStyles()` that you can wrap around your component.

PERTAIN_TOProblem

Initializing a Zustand store with data fetched asynchronously from an API is messy when using a separate init() function, requiring extra state like isInitialized to prevent subscribers from running too early. The store creation function cannot be async, so awaiting fetches during createStore is not possible.

PERTAIN_TOSolution

Use Zustand’s recommended store context provider pattern so the store can be created after props/data are available. In the provider, fetch API data in a useEffect, then initialize the store (via a ref) with the fetched results, ensuring components only access the store after it’s created.

PERTAIN_TOSolution

There should be 3 parameters, but 2 are obtained. ts(2554) — const useBearStore = create()( subscribeWithSelector( (set, get) => createBearSlice(set, get) // there report error ) ). Outcome: export const useStore = create()(subscribeWithSelector((...params) => ({ ...createBearSlice(...params), ...createProjSlice(...params) }))).

PERTAIN_TOSolution

subscribe to store changes to fire side-effect — What you can do is to subscribe to store changes. Tension: you will have to send the whole state of the store every time it changed. Outcome: use subscribe with selectors.

PERTAIN_TOProblem

Tanstack react-table expects a function for controlling the change handlers — with the tanstack table. Tension: which I am trying to use with the tanstack table.

PERTAIN_TOProblem

React throws "Invalid hook call" when Zustand hooks are accessed via an Inversify-injected service (TypeScript) outside of a React component.

PERTAIN_TOProblem

How can I subscribe / unsubscribe to a Zustand nested object store? — I have a Zustand store as follows:. Tension: subscribe / unsubscribe to a Zustand nested object store. Outcome: You can use the `subscribeWithSelector` middleware.

PERTAIN_TOSolution

Guard `localStorage` access with a client-only check (e.g., `typeof window !== 'undefined'` / run only in a client component) and initialize the Zustand store once on mount; optionally delay rendering of cart UI until initialization completes to avoid showing `0` temporarily.

PERTAIN_TOSolution

Use get() inside the store creator to read current state, and call useCart.getState() only on the store hook instance

PERTAIN_TOSolution

...a in the parameter list of the arrow function inside create() means that the function can accept any number of arguments — In the context of the create() function from the Zustand library. Tension: those arguments will be collected into an array called a. Outcome: In this case it will be [set, get].

PERTAIN_TOProblem

When using Zustand with the devtools middleware, only one store’s actions/state could be inspected at a time in browser DevTools despite creating multiple stores. Additional imports of alternative devtools middleware options did not enable multiple stores to appear.

PERTAIN_TOSolution

Create each store with its own devtools options (e.g., pass a unique `name`/`store` identifier) when calling `create(devtools(...))`, or combine multiple store slices into a single `create(devtools(...))` instance so both sets of state/actions are registered together.

PERTAIN_TOProblem

They share the store. — rendering multiple cat components in a list. Tension: But what if I want each component to get their own store?

PERTAIN_TOProblem

A TypeScript error occurs when using Zustand's persist middleware with a custom StateCreator, stating that a StateCreator argument is not assignable to the expected StateCreator type due to mismatched $$storeMutators typing.

PERTAIN_TOSolution

Use the zustand hook in client components and call the store actions (e.g., `const login = useAuthStore(state => state.login)`) after successful auth, passing the received token to `login(token)`, and call `useAuthStore(state => state.logout)` on logout.

PERTAIN_TOSolution

Update the store slice directly without the functional `set` callback, e.g. `set({ storagePolicySettings })` instead of spreading and returning a new state object.

PERTAIN_TOProblem

Ant Design Table crashes on initial render with `Uncaught TypeError: rawData.some is not a function`. This happens while fetching/displaying users data in React.

PERTAIN_TOSolution

Ensure `dataSource` is an array of objects before rendering (e.g., convert `dataSource = {...order}` to `dataSource = [{...order}]` or otherwise map/filter into an array).

PERTAIN_TOProblem

Calling setAuthToken updates the internal value but components using authToken do not reflect the change and the UI/state appears stale.

PERTAIN_TOProblem

Updating an input causes the entire React app to refresh/re-render, even though only part of the Zustand state should change.

PERTAIN_TOSolution

Type the store using Zustand’s `StateCreator`/`StoreCreator` generic with the `TemplateStore` interface, and use that typed signature for the `templateStore` function so `set` and state updates are correctly inferred.

PERTAIN_TOProblem

The user tries to mock a Zustand store (state values and actions) in a Jest test file but fails to override the store used by the React component. As a result, the component does not receive the mocked state/action implementations.

PERTAIN_TOSolution

Properly mock the Zustand store module by spying on/overriding the store export (the Zustand `create` result or the correct store factory export) to return a custom state and action implementation, then render the component and assert against the mocked behavior.

PERTAIN_TOSolution

To import vanilla's default export, you'd need to do.

PERTAIN_TOSolution

Use the functional form of zustand's setState: useStore.setState((prev) => ({ stateOne: { ...prev.stateOne, newProperty: 'value' } })) (and when updating Map/Set, create new instances).

PERTAIN_TOProblem

can't for the life of me get the typing to work out correctly — create a wrapper hook for `useStore` that will just take a list of keys. Tension: Zustand's types are pretty complicated and do a lot of inference.

PERTAIN_TOSolution

const useMulti = ( useStoreFn: UseBoundStore>, ...items: K[] ): Pick => useStoreFn((state) => Object.fromEntries(items.map((item) => [item, state[item]])) as Pick ) — wrapper hook for `useStore`. Outcome: const useStoreState = (...items: Array) => useMulti(useStore, ...items).

PERTAIN_TOProblem

Updating `retry_n` from `@/utils/get.js` using `retryStore.setState({ retry_n: retry_n + 1 })` does not change the logged value; it remains `0` across iterations even though the update code runs.

PERTAIN_TOProblem

When multiple React components use Zustand selectors like `useStore(state => state.largeDataset)`, does each component end up copying the large dataset into its own memory, increasing total RAM usage?

PERTAIN_TOSolution

Treat the selected value as a shared reference (avoid unnecessary cloning/deriving new arrays/objects in selectors). If memory pressure occurs, ensure large datasets are not being copied or accidentally retained (e.g., avoid creating new Float32Array/object instances per render; consider weak caching patterns such as WeakMap only for derived mappings).

PERTAIN_TOProblem

How to populate a Zustand store with a user object fetched from Firebase, ideally by copying the returned object into state so it persists across the app.

PERTAIN_TOSolution

Set the `user` slice using the Firebase data passed into the setter, creating a shallow copy via spread (e.g., `userStore.setState(() => ({ user: { ...userData } }))`), or create a shallow copy of existing store state with `const copy = { ...useStore.getState() }`.

PERTAIN_TOProblem

A Zustand store value (e.g., currentUser) logs as null on first access, but becomes correct after a rerender. This suggests the expected persisted data hasn’t finished loading yet.

PERTAIN_TOSolution

Load the async user data with a Suspense-compatible async pattern (e.g., using `leo-query`’s `query`/`subscribe`) so the component waits until `currentUser` is available before rendering.

PERTAIN_TOProblem

Storing a huge state object (e.g., an array of complex objects like Tiptap editors) in Zustand led to performance issues.

PERTAIN_TOSolution

Define set/get action functions in the Zustand state slice so they can be reused by any component consistently, using state helpers like get() inside the slice for current state access.

PERTAIN_TOProblem

switching the input from uncontrolled to controlled — If I don’t set a defaultValue for the number input. Outcome: use a modified, "controlled" version of the `Input` component by passing a default `value` to the underlying ``.

PERTAIN_TOSolution

You can use `coerce` to parse the value into a `number` — with react-hook-form, Zod, and ShadCN UI. Tension: This way you don't have to define a default value either. Outcome: passing a default `value` to the underlying ``.

PERTAIN_TOSolution

const dataRow = row.original; — cell: ({ row }) => {. Tension: add onClickto DropdownMenu action. Outcome: openEditModal(payment) }>.

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