fix: inline style override for padding/margin properties#4
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- Reverse style array order in Babel plugin optimization ([__ks.base, props.style]) - Expand shorthand properties (padding, margin) to longhand for proper override - Add tests for expandShorthandProperties function
WalkthroughRefactored padding/margin shorthand expansion to emit explicit longhand (top/right/bottom/left) in plugin and runtime; added a runtime utility to expand external styles; and reordered style source application to apply base styles before external styles to allow external overrides. Changes
Sequence Diagram(s)sequenceDiagram
participant Component
participant Plugin/Runtime as Processor
participant expandShorthand as Expander
participant buildStyleArray as Builder
participant Merger
Component->>Processor: request render (has __ks.base, props.style)
Note over Processor: NEW order: apply __ks.base first, then props.style
Processor->>Builder: buildStyleArray([__ks.base, props.style])
Builder->>expandShorthand: expand external style objects (padding/margin)
alt shorthand present
expandShorthand-->>Builder: explicit longhand props (paddingTop/Right/Bottom/Left...)
else no shorthand
expandShorthand-->>Builder: unchanged props
end
Builder->>Merger: merge base longhand + expanded external longhand
Merger-->>Component: final style (external overrides base)
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes
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Pre-merge checks and finishing touches✅ Passed checks (3 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
📜 Recent review detailsConfiguration used: CodeRabbit UI Review profile: CHILL Plan: Pro ⛔ Files ignored due to path filters (1)
📒 Files selected for processing (2)
🔇 Additional comments (7)
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🧹 Nitpick comments (1)
packages/kstyled/src/utils/style-merger.ts (1)
94-111: Consider memoizing expanded external styles for performance.The
expandShorthandPropertiesfunction is called on every render when external styles are present. For components that re-render frequently or have complex external styles, consider memoizing the expansion result to avoid redundant object iterations.This is likely not a bottleneck in most cases given the function's simplicity, but could be considered if profiling reveals performance issues.
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (6)
packages/babel-plugin-kstyled/src/css-parser.ts(2 hunks)packages/babel-plugin-kstyled/src/index.ts(1 hunks)packages/kstyled/src/css.tsx(1 hunks)packages/kstyled/src/styled.tsx(1 hunks)packages/kstyled/src/utils/__tests__/style-merger.test.ts(1 hunks)packages/kstyled/src/utils/style-merger.ts(2 hunks)
🧰 Additional context used
🧬 Code graph analysis (2)
packages/kstyled/src/styled.tsx (1)
packages/kstyled/src/utils/style-merger.ts (1)
buildStyleArray(73-115)
packages/kstyled/src/utils/__tests__/style-merger.test.ts (1)
packages/kstyled/src/utils/style-merger.ts (1)
expandShorthandProperties(11-65)
🪛 GitHub Actions: Tests
packages/babel-plugin-kstyled/src/index.ts
[error] 1-1: Command 'pnpm --filter babel-plugin-kstyled --filter kstyled test' failed with exit code 1 (jest); ERR_PNPM_RECURSIVE_RUN_FIRST_FAIL
packages/babel-plugin-kstyled/src/css-parser.ts
[error] 1-1: Command 'pnpm --filter babel-plugin-kstyled --filter kstyled test' failed with exit code 1 (jest); ERR_PNPM_RECURSIVE_RUN_FIRST_FAIL
🔇 Additional comments (9)
packages/babel-plugin-kstyled/src/index.ts (2)
598-607: LGTM! Style precedence order correctly implements override semantics.The reordering ensures external styles (props.style) override base styles (__ks.base) as intended. In React Native, styles are merged left-to-right in arrays, so placing base styles first and external styles last gives external styles the highest priority.
1-1: Provide specific pipeline failure details to verify the actual issue.The original review claims test failures without providing evidence. I've inspected the codebase and found:
- All source files (index.ts, css-parser.ts, types.ts, transform.ts) are syntactically valid
- Jest configuration is properly set up
- Test file exists with structured test cases
- All imports resolve correctly
To verify the claimed pipeline failures, please share:
- The actual error messages or logs from the failing tests
- The specific test names that are failing
- The full CI/CD pipeline output
Without concrete failure details, I cannot determine if issues exist or what specifically needs to be fixed.
packages/babel-plugin-kstyled/src/css-parser.ts (2)
212-228: LGTM! Shorthand expansion correctly implements longhand properties for proper override behavior.The logic correctly expands CSS shorthand values to explicit longhand properties:
- 2 values (vertical horizontal): top/bottom get parts[0], right/left get parts[1]
- 3 values (top horizontal bottom): top=parts[0], right/left=parts[1], bottom=parts[2]
This ensures external styles can override individual sides when base styles use longhand properties, preventing React Native's inconsistent behavior with mixed shorthand/longhand properties.
239-256: LGTM! Margin expansion logic is consistent with padding.The margin shorthand expansion follows the same correct pattern as padding, ensuring consistent override semantics across both properties.
packages/kstyled/src/utils/__tests__/style-merger.test.ts (1)
1-147: LGTM! Comprehensive test coverage for expandShorthandProperties.The test suite thoroughly validates:
- All shorthand expansions (padding, margin, horizontal, vertical variants)
- Preservation of non-shorthand properties
- Mixed shorthand scenarios
- Edge cases (null, undefined, empty objects)
Well-structured and provides confidence in the utility function's correctness.
packages/kstyled/src/css.tsx (1)
140-163: LGTM! Runtime parser correctly mirrors build-time shorthand expansion.The runtime CSS parsing logic for padding/margin shorthands is consistent with the build-time parser (css-parser.ts), ensuring uniform behavior regardless of whether styles are processed at build time or runtime. All shorthand cases (1-4 values) correctly expand to longhand properties.
packages/kstyled/src/styled.tsx (1)
123-132: LGTM! Correctly uses merged metadata for style inheritance.Using
mergedCompiledStylesandmergedStyleKeysinstead of the component's owncompiledStyles/styleKeysensures that inherited base styles are properly included in the style array. This aligns with the broader changes in the PR to ensure correct style precedence and override behavior.packages/kstyled/src/utils/style-merger.ts (2)
5-65: LGTM! Utility function correctly expands all padding/margin shorthands to longhand.The implementation correctly handles all React Native padding/margin shorthand properties and expands them to explicit longhand properties (top/right/bottom/left). The function also properly:
- Handles null/undefined/non-object inputs
- Preserves non-shorthand properties
- Uses Object.prototype.hasOwnProperty.call for safe iteration
Note on property ordering edge case: If an external style object contains both a shorthand property and its corresponding longhand property (e.g.,
{ padding: 10, paddingTop: 20 }), the final result depends on object property iteration order. Since modern JavaScript maintains insertion order, the last defined property wins. This is consistent with CSS/React Native semantics where later declarations override earlier ones.
94-111: LGTM! External style expansion ensures consistent override semantics.Expanding external styles to longhand properties before adding them to the style array ensures they can properly override base longhand properties. This addresses React Native's inconsistent handling of mixed shorthand/longhand properties across different style objects in an array.
The implementation correctly handles both array and non-array external styles.
1 participant
Summary by CodeRabbit
Bug Fixes
Tests