step-state-no-history
Multi-step flow uses useState without browser history — back button exits the app
Applies to: JavaScript, TypeScript
Why this matters
When a multi-step flow (booking wizard, onboarding, form wizard) tracks its current step in a plain useState, the browser has no idea the user navigated between steps. Clicking the back button doesn't go to the previous step — it leaves the app entirely. Sync step state with the URL via useSearchParams, router.push, or window.history.pushState so back/forward navigation works.
Catch it before it ships
pip install stablestack # or: npx stablestackstablestack # scans your project, FRONT013 includedstablestack explain FRONT013FRONT013 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: FRONT013
More Frontend checks
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MUI Tabs should use URL routing via useSearchParams for bookmarkable/shareable tabs.
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Accessing window/document without SSR check causes server-side errors
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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.