Refactor: Extract shared PseudoStateGrid component in pseudo-states stories

[Copilot]

The 8-cell pseudo-state combination grid (Normal, Hover, Focus, Active, and their combinations) was copy-pasted verbatim across 6 story files in addon-pseudo-states, totalling ~200 lines of near-identical JSX and creating a maintenance hazard.

Changes

• New PseudoStateGrid.tsx — shared component accepting a render: (label: string) => ReactNode prop that owns the grid layout and all pseudo-state class combinations
• Refactored All story in all 6 files to delegate to PseudoStateGrid:
  • Button.stories.tsx
  • CSSAtRules.stories.tsx
  • CustomElement.stories.tsx
  • CustomElementNested.stories.tsx
  • ShadowRoot.stories.tsx
  • ShadowRootWithPart.stories.tsx

Usage

export const All: Story = {
  render: (args) => (
    <PseudoStateGrid render={(label) => <Button {...args}>{label}</Button>} />
  ),
};

Adding a new pseudo-state or changing the grid layout now requires a single edit. Existing DynamicStyles stories that call All.render! directly continue to work unchanged.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Duplicate Code: Repeated pseudo-state grid render in 6 story files</issue_title>
<issue_description>Analysis of commit 6798300

Assignee: @copilot

Summary

The All story export with an 8-cell pseudo-state grid (Normal, Hover, Focus, Active, Hover+Focus, Hover+Active, Focus+Active, Hover+Focus+Active) is copy-pasted nearly verbatim across 6 story files in the addon-pseudo-states package. Each instance is 28–40 lines of near-identical JSX, differing only in the child component used.

Duplication Details

Pattern: Pseudo-state combination grid in All story export

• Severity: Medium

• Occurrences: 6 instances

• Locations:

  • code/addons/pseudo-states/src/stories/Button.stories.tsx (lines 19–49)
  • code/addons/pseudo-states/src/stories/CSSAtRules.stories.tsx (lines 22–52)
  • code/addons/pseudo-states/src/stories/CustomElement.stories.tsx (lines 21–59)
  • code/addons/pseudo-states/src/stories/CustomElementNested.stories.tsx (lines 21–59)
  • code/addons/pseudo-states/src/stories/ShadowRoot.stories.tsx (lines 17–47)
  • code/addons/pseudo-states/src/stories/ShadowRootWithPart.stories.tsx (lines 17–47)

• Code Sample (representative, from Button.stories.tsx):

  export const All: Story = {
    render: (args) => (
      (div className="story-grid")
        (div)(Button {...args})Normal(/Button)(/div)
        (div className="pseudo-hover-all")(Button {...args})Hover(/Button)(/div)
        (div className="pseudo-focus-all")(Button {...args})Focus(/Button)(/div)
        (div className="pseudo-active-all")(Button {...args})Active(/Button)(/div)
        (div className="pseudo-hover-all pseudo-focus-all")(Button {...args})Hover Focus(/Button)(/div)
        (div className="pseudo-hover-all pseudo-active-all")(Button {...args})Hover Active(/Button)(/div)
        (div className="pseudo-focus-all pseudo-active-all")(Button {...args})Focus Active(/Button)(/div)
        (div className="pseudo-hover-all pseudo-focus-all pseudo-active-all")(Button {...args})Hover Focus Active(/Button)(/div)
      (/div)
    ),
  };

Additionally, the Default, Hover, Focus, and Active story exports with identical parameters: { pseudo: { (state): true } } shapes are repeated in all 6 files (~8–12 lines each).

Impact Analysis

• Maintainability: Adding a new pseudo-state (e.g., focus-within) requires updating all 6 files individually. Any UI layout change to the grid must be replicated 6 times.
• Bug Risk: Inconsistencies are already present (e.g., Button.stories.tsx uses args in the render, CustomElement doesn't). A fix in one file is unlikely to be applied to the others.
• Code Bloat: ~200 lines of redundant JSX across the stories directory.

Refactoring Recommendations

1. Extract a shared PseudoStateGrid component

   • Create: code/addons/pseudo-states/src/stories/PseudoStateGrid.tsx
   • Accept a render: (label: string) => ReactNode prop for the child component
   • Replace all All renders with (PseudoStateGrid render={(label) =) (Button {...args}){label}(/Button)} />
   • Estimated effort: 1–2 hours
   • Benefits: Single source of truth for grid layout, easier to extend with new states

2. Extract shared base story exports

   • Define Default, Hover, Focus, Active once in a shared file and re-export or spread into each story file
   • Estimated effort: 30 minutes

Implementation Checklist

• Review duplication findings
• Create PseudoStateGrid shared component
• Refactor all 6 story files to use the shared component
• Extract shared base story exports
• Verify no visual/functional regression in Storybook

Analysis Metadata

• Analyzed Files: 6
• Detection Method: Serena semantic code analysis + manual pattern comparison
• Commit: 6798300
• Analysis Date: 2026-03-23

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Comments on the Issue (you are @Copi...

• Fixes Duplicate Code: Repeated pseudo-state grid render in 6 story files #34268

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☁️ Nx Cloud last updated this comment at 2026-03-26 14:32:54 UTC

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 738718f4-edfb-4037-a309-b85d123a51b5

📥 Commits

Reviewing files that changed from the base of the PR and between d19270e and a413a7f.

📒 Files selected for processing (7)

• code/addons/pseudo-states/src/stories/Button.stories.tsx
• code/addons/pseudo-states/src/stories/CSSAtRules.stories.tsx
• code/addons/pseudo-states/src/stories/CustomElement.stories.tsx
• code/addons/pseudo-states/src/stories/CustomElementNested.stories.tsx
• code/addons/pseudo-states/src/stories/PseudoStateGrid.tsx
• code/addons/pseudo-states/src/stories/ShadowRoot.stories.tsx
• code/addons/pseudo-states/src/stories/ShadowRootWithPart.stories.tsx

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📝 Walkthrough

Walkthrough

A new reusable PseudoStateGrid component was created to centralize the rendering of pseudo-state grid layouts. Six story files were refactored to use this component instead of maintaining individual hardcoded grid structures with duplicate label and CSS class logic.

Changes

Cohort / File(s)	Summary
New Component code/addons/pseudo-states/src/stories/PseudoStateGrid.tsx	Introduced PseudoStateGrid component that accepts a render callback to generate pseudo-state variations (Normal, Hover, Focus, Active, and combinations). Handles grid layout and CSS class application for all pseudo-state combinations.
Refactored Story Files code/addons/pseudo-states/src/stories/Button.stories.tsx, CSSAtRules.stories.tsx, CustomElement.stories.tsx, CustomElementNested.stories.tsx, ShadowRoot.stories.tsx, ShadowRootWithPart.stories.tsx	Replaced hardcoded grid layouts with PseudoStateGrid component. Each story now passes a render callback to delegate label generation and pseudo-state rendering, removing duplicate DOM structure and CSS class management.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~20 minutes

✨ Finishing Touches

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• Create stacked PR
• Commit on current branch

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