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Graph/render-triggered-async-reexecution-loop

AntiPattern

Render-Triggered Async Loops

render-triggered-async-reexecution-loop

Async work (refetch, lazy imports, or session/group resolution) gets triggered from render-time state or mount effects, so small state changes cause remounts and re-execution, producing repeated requests and out-of-order UI updates that look like infinite loops or stale data.

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Public graph metadata

Updated6/23/2026

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30 linked nodes

MATCHESSolution

you can use Zustand getters and optimistic update — multiple or rapid clicks could actually cause the updates to be executed but out of order. Tension: no optimistic update so u see that delay (lag) you said about.

MATCHESSolution

Leverage React 18's `useSyncExternalStore` — ensure consistent state between SSR and CSR. Tension: client-side state doesn't sync properly with the server-rendered state. Outcome: to ensure consistent state between SSR and CSR.

MATCHESSolution

Track loading per request (e.g., per action or with a counter) instead of one global boolean, or guard/remain mounted so that remounting does not retrigger the fetch. E.g., use separate `loading` flags or increment/decrement an in-flight counter and render spinner only when the counter is > 0.

MATCHESSolution

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.

MATCHESSolution

Create/move the React.lazy import initialization so it isn’t executed on every render (e.g., place the lazy call in the same component as Suspense) to ensure the import is stable and doesn’t trigger repeated re-renders.

MATCHESSolution

Instead of `useRef`, we can change it to `useState` — for a DOM node that may not exist or change during the component's render. Tension: so that we can track ref changes in the state and trigger re-renders as needed.

MATCHESSolution

handle a scenario when the code is fine but backend went offline — prefetching data with usePrefetchQuery. Tension: prefetch works.

MATCHESSolution

Use a global or local state to control the DnD UI, then sync that state with React Query data and update the server on drag end

MATCHESSolution

make sure that the form component is only rendered after data is ready — Decouple the data fetching component from the form component. Tension: background refetches will not be reflected. Outcome: if your cache already has stale data when `App` mounts, you'll get that data in your state.

MATCHESSolution

I try putting a setName(data.name) inside a useEffect that runs only when "isLoading" changes, and it works — edit/change the "name" retrieved by the query. Tension: I would think there is a better and more clean way to do it. Outcome: use a `useEffect` hook to "synchronize" a React state to an external source.

MATCHESSolution

rendering the rows as a non complex component like a spinner or something — my laggy components were loading in as i scrolled etc. Tension: excessive blanking of the page. Outcome: using useEffect to determine if it is fully rendered, you can resolve most of the major blanking issues.

MATCHESSolution

Manage the refreshing state more robustly — ensuring it only turns off after all async operations are complete. Tension: remove the arbitrary timeout. Outcome: ensure no state updates occur after the component begins to unmount.

MATCHESSolution

Wrap you components that rely on React Query data — React Query data. Outcome: with Suspense and HydrationBoundary.

MATCHESSolution

single worker running async loop. Outcome: So you have a single worker running async loop and you block that loop.

MATCHESSolution

Change the engine async fixture from session scope to function scope (remove scope="session") so all async fixtures/tests run on the same event loop, preventing the cross-loop Future/Task error.

MATCHESSolution

any time you have an I/O bound process with lots of idle time — waiting for user input, waiting for a TLS handshake. Tension: wrapping it in an async task can let other code run.

MATCHESSolution

No ref to prevent redundant state updates — `setState` inside an observer callback that runs on every scroll event. Tension: React still processes the `setState` call even if the value is the same. Outcome: const lastIdRef = useRef(null);.

MATCHESSolution

Defer the toast invocation on mount using `setTimeout` or `requestAnimationFrame` inside `useEffect` (optionally guarding with a ref for React.StrictMode double-mount).

MATCHESSolution

You are not allowed in Redux, ever, to dispatch from inside a reducer. — Reducer logic has to be a pure synchronous function without side effects. Tension: You might want to do the logic you are currently doing in a thunk or with the listener middleware instead. Outcome: You have to use `createAsyncThunk` for that.

MATCHESSolution

Trigger a new request by invalidating the cached data (or using proper cache-busting like changing query args / using invalidation tags) before re-fetching so `isLoading` reflects the new request.

MATCHESSolution

An async function was passed to useActionState.

MATCHESSolution

Load and parse the localStorage drawing inside a lazy `useState` initializer so `initialData` is correct on first render, and ensure parsing is guarded (e.g., fallback to `[]` or handle parse errors) before passing data to Excalidraw.

MATCHESSolution

`useCallback` needs to be used — to be used as a callback and thus prevent the unnecessary re-renders. Tension: `memo` can't prevent `ExpensiveComponent` from being re-rendered. Outcome: const handleRender = useCallback(() => {...}, []);.

MATCHESSolution

Track image load completion with state (e.g., increment a counter in each Image `onLoad` handler) and only render the button/UI once the counter equals the total number of images.

MATCHESSolution

resize events often occur as many events in quick succession. Tension: the resize behaviour is also a little broken. Outcome: React queues the update.

MATCHESSolution

Move the reset logic into a useEffect (or handle reset from the parent via props) so state updates occur as effects rather than during render. In the parent, toggle the reset flag (and optionally set it back to false after the update) to trigger the child's reset without causing continuous re-renders.

MATCHESSolution

Use React async state management (e.g., `useAsync` or `useEffect` + `useState`) to await `currentSession()`, render a loading UI while pending, and only compute `isGroupOne` from the resolved array (e.g., `groups.some(...)`) after the Promise resolves.

MATCHESSolution

Use the render-prop approach when you want the parent to control the rendered UI based on data/state produced by the component (e.g., isEnabled/variables from a hook); otherwise consider a hook-based API, but render props remain a common and valid pattern.

MATCHESSolution

JSON.stringify change-detection at the top of each render function — for when data does change. Tension: This eliminates ~95% of unnecessary DOM rebuilds. Outcome: compare current data with previous, return early if unchanged.

MATCHESSolution

Resolved activity IDs to visible renderer IDs before queueing pulses — pulse-only animation. Outcome: paused the renderer when idle.

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