eager-queries-no-defer
3+ query hooks all firing on mount with no deferred loading.
Applies to: JavaScript, TypeScript
Why this matters
When a component has 3 or more useQuery/tRPC query hooks that all fire immediately on mount, it floods the network with parallel requests — even for data the user hasn't scrolled to or interacted with yet. Use the `enabled` option to defer non-critical queries until their data is needed.
Catch it before it ships
pip install stablestack # or: npx stablestackstablestack # scans your project, FRONT009 includedstablestack explain FRONT009FRONT009 is part of the Pro rule set. See pricing — the free tier ships 24 checks with no signup.
False positive in your codebase? Suppress a single line with # noqa: FRONT009
More Frontend checks
tabs-url-routing
MUI Tabs should use URL routing via useSearchParams for bookmarkable/shareable tabs.
FRONT002window-ssr-unsafe
Accessing window/document without SSR check causes server-side errors
FRONT003inline-jsx-handler
Inline arrow functions in JSX cause unnecessary re-renders
FRONT004nextjs-redirect-request-url
Redirect uses request.url as URL base, which is wrong behind a reverse proxy.
FRONT005useeffect-side-effect-unguarded
useEffect contains a mutating HTTP call without a guard against double-firing.
FRONT006stale-time-dependent-ui
Time-dependent filtering without a re-render timer will show stale data.
FRONT007unbounded-ai-output
AI/LLM output rendered in JSX without truncation or overflow handling.
FRONT008loading-returns-null
Returning null during loading causes layout shift and flash of empty content.