react-doctor/rn-scrollview-flex-in-content-container

Replace `flex: <positive number>` on contentContainerStyle with `flexGrow: 1`

• Category: Bugs
• Severity: warn
• Source: oxlint-plugin-react-doctor
• Framework: react-native
• Enabled when: framework=react-native and capabilities=react-native
• Tags: react-native, test-noise
• Default: Enabled
• Documentation: https://reactnative.dev/docs/scrollview#contentcontainerstyle

Validation prompt

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Fires on a JSXOpeningElement whose resolved name is ScrollView, FlatList, SectionList, VirtualizedList, KeyboardAwareScrollView, FlashList, or LegendList that has a contentContainerStyle prop resolving to an object literal containing a flex key whose value is a numeric Literal greater than 0 — either inline ({{ flex: 1 }}) or via one level of binding to a StyleSheet.create({ container: { flex: 1 } }) map referenced as styles.container or styles['container']. False positive: the rule correctly stays silent and you should too when flex is 0 or negative (intentional RN non-flexible / shrink-to-min modes), when the value is non-literal/dynamic (flex: value), when flexGrow or flexBasis appears alongside flex (author is deliberately overriding a shorthand slot), when flex sits on style rather than contentContainerStyle, on non-scroll components like View, when the style comes from a plain object literal that is NOT StyleSheet.create, when the StyleSheet key is missing or computed dynamically (styles[key]), or in test-like files (tagged test-noise).

Fix prompt

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On the scroll container's contentContainerStyle, replace the flex: <number> shorthand with flexGrow: 1 (e.g. contentContainerStyle={{ flexGrow: 1 }} or the matching StyleSheet.create entry { flexGrow: 1 }). In React Native flex: 1 expands to flexBasis: 0, which collapses the content container to zero height once the inner content exceeds the viewport on small devices; flexGrow: 1 keeps the fill-remaining-space behavior without the basis-0 collapse. Leave flex: 0, negative flex, or a flex paired with an explicit flexGrow/flexBasis untouched, since those are deliberate. See https://reactnative.dev/docs/scrollview#contentcontainerstyle

Related rules

More Bugs rules from the rules reference:

• react-doctor/rn-style-prefer-boxshadow: Use the cross-platform CSS `boxShadow` string (RN v7+): `boxShadow: "0 2px 8px rgba(0,0,0,0.1)"` instead of platform-specific shadow*/elevation keys
• react-doctor/rules-of-hooks: Enforce the Rules of Hooks: call hooks only at the top level of components and custom hooks, never in conditions or loops.
• react-doctor/server-after-nonblocking: `import { after } from 'next/server'` then wrap: `after(() => analytics.track(...))` — response isn't blocked
• react-doctor/server-auth-actions: Add `const session = await auth()` at the top and throw/redirect if unauthorized before any data access
• react-doctor/server-cache-with-object-literal: Pass primitives to React.cache()-wrapped functions — argument identity (not deep equality) is the dedup key, so a fresh `{}` per render bypasses the cache