react-doctor/no-inline-prop-on-memo-component

Hoist the inline `() => ...` / `[]` / `{}` to a stable reference (useMemo, useCallback, or module scope) so the memoized child doesn't re-render every parent render

• Category: Performance
• Severity: warn
• Source: oxlint-plugin-react-doctor
• Framework: global
• Enabled when: always

Validation prompt

Use this to decide whether a fired diagnostic is real or a false positive.

Confirm the JSX element name is bound to memo(...) or React.memo(...) in the same file, and the flagged attribute is a fresh-each-render value: arrow function, function expression, .bind() call, object literal, array literal, or inline JSX. memo() short-circuits only when props are referentially equal, so each new reference breaks memoization.

Fix prompt

Use this once validation confirms the diagnostic is real.

Wrap functions in useCallback, objects/arrays in useMemo, or hoist them to module scope when they don't depend on props/state. For inline JSX children, declare them as constants outside the component or extract a separate memoized child. See https://react.dev/reference/react/memo#minimizing-props-changes

Related rules

More Performance rules from the rules reference:

• react-doctor/no-large-animated-blur: Keep blur radius under 10px, or apply blur to a smaller element. Large blurs multiply GPU memory usage with layer size
• react-doctor/no-layout-property-animation: Use `transform: translateX()` or `scale()` instead — they run on the compositor and skip layout/paint
• react-doctor/no-layout-transition-inline: Use `transform` and `opacity` for transitions — they run on the compositor thread. For height animations, use `grid-template-rows: 0fr → 1fr`
• react-doctor/no-long-transition-duration: Keep UI transitions under 1s — 100-150ms for instant feedback, 200-300ms for state changes, 300-500ms for layout changes. Use longer durations only for page-load hero animations
• react-doctor/no-permanent-will-change: Add will-change on animation start (`onMouseEnter`) and remove on end (`onAnimationEnd`). Permanent promotion wastes GPU memory and can degrade performance