web-component-design

# Web Component Design Build reusable, maintainable UI components using modern frameworks with clean composition patterns and styling approaches. ## When to Use This Skill - Designing reusable component libraries or design systems - Implementing complex component composition patterns - Choosing and applying CSS-in-JS solutions - Building accessible, responsive UI components - Creating consistent component APIs across a codebase - Refactoring legacy components into modern patterns - Implementing compound components or render props ## Core Concepts ### 1. Component Composition Patterns **Compound Components**: Related components that work together ```tsx // Usage <Select value={value} onChange={setValue}> <Select.Trigger>Choose option</Select.Trigger> <Select.Options> <Select.Option value="a">Option A</Select.Option> <Select.Option value="b">Option B</Select.Option> </Select.Options> </Select> ``` **Render Props**: Delegate rendering to parent ```tsx <DataFetcher url="/api/users"> {({ data, loading, error }) => loading ? <Spinner /> : <UserList users={data} /> } </DataFetcher> ``` **Slots (Vue/Svelte)**: Named content injection points ```vue <template> <Card> <template #header>Title</template> <template #content>Body text</template> <template #footer><Button>Action</Button></template> </Card> </template> ``` ### 2. CSS-in-JS Approaches | Solution | Approach | Best For | | ----...