Backstage Style Web Generator

Overview

Create professional, enterprise-grade web applications using the Backstage Design System. This skill generates modern React applications with TypeScript, featuring comprehensive UI components, dark/light theme support, responsive design, and accessibility-first patterns. Perfect for building admin dashboards, developer tools, internal applications, and data management interfaces.

Backstage Design System Implementation Guide

Core Architecture Overview

The Backstage Design System is built on modern React patterns and industry-standard libraries:

Technology Stack

• React 18+ with TypeScript
• Radix UI Primitives for accessible, headless components
• Tailwind CSS for utility-first styling
• Class Variance Authority (CVA) for type-safe component variants
• React Hook Form with Zod validation
• Lucide React for consistent iconography

Key Design Principles

1. Accessibility First: Built on Radix UI primitives with ARIA support
2. Type Safety: Full TypeScript coverage with strict typing
3. Composability: Components designed for flexible composition
4. Consistency: Unified design tokens and patterns
5. Performance: Optimized for bundle size and runtime performance

Component Architecture Patterns

1. Compound Components

Components are designed with multiple sub-components for maximum flexibility:

// Card component structure
<Card>
  <CardHeader>
    <CardTitle>Title</CardTitle>
    <CardDescription>Description</CardDescription>
    <CardAction>Action buttons</CardAction>
  </CardHeader>
  <CardContent>
    Main content
  </CardContent>
  <CardFooter>
    Footer content
  </CardFooter>
</Card>

2. Variant-Based Styling

Using CVA for type-safe, predictable component variants:

const buttonVariants = cva(
  "inline-flex items-center justify-center rounded-md text-sm font-medium",
  {
    variants: {
      variant: {
        default: "bg-primary text-primary-foreground hover:bg-primary/90",
        destructive: "bg-destructive text-destructive-foreground hover:bg-destructive/90",
        outline: "border border-input bg-background hover:bg-accent",
        secondary: "bg-secondary text-secondary-foreground hover:bg-secondary/80",
        ghost: "hover:bg-accent hover:text-accent-foreground",
        link: "text-primary underline-offset-4 hover:underline",
      },
      size: {
        default: "h-10 px-4 py-2",
        sm: "h-9 rounded-md px-3",
        lg: "h-11 rounded-md px-8",
        icon: "h-10 w-10",
      },
    },
    defaultVariants: {
      variant: "default",
      size: "default",
    },
  }
);

3. Data Attributes for Styling

Consistent use of data attributes for component identification and styling:

<div
  data-slot="card"
  className="bg-card text-card-foreground rounded-lg border"
>
  <div data-slot="card-header">
    {/* Header content */}
  </div>
</div>

Theme System Implementation

1. Color Architecture

Brand Colors (11-step scale)

:root {
  --brand-050: #F5F1F0;  /* 最浅背景色 */
  --brand-100: #E9DDDB;  /* Hover background / light tint */
  --brand-200: #D6BEBB;  /* Soft background */
  --brand-300: #B78F8A;  /* Subtle brand tint */
  --brand-400: #94635E;  /* Hover / outline */
  --brand-500: #6A4040;  /* Primary brand color */
  --brand-600: #5B3535;  /* Active / pressed */
  --brand-700: #4C2D2D;  /* Stronger contrast */
  --brand-800: #3E2525;  /* Deep background */
  --brand-900: #2E1C1C;  /* Text on light */
  --brand-950: #1C1010;  /* Text on dark / darkest tone */
}

Semantic Color Tokens

:root {
  /* === Light Mode === */
  --background: hsl(48, 33%, 98%);
  --foreground: hsl(0, 25%, 33%);
  --card: hsl(48, 33%, 98%);
  --card-foreground: hsl(0, 25%, 33%);
  --popover: hsl(48, 33%, 98%);
  --popover-foreground: hsl(0, 25%, 33%);
  --primary: hsl(222, 28%, 14%);
  --primary-foreground: hsl(48, 33%, 98%);
  --secondary: hsl(210, 25%, 96%);
  --secondary-foreground: hsl(0, 25%, 33%);
  --muted: hsl(210, 25%, 96%);
  --muted-foreground: hsl(215, 9%, 46%);
  --accent: hsl(210, 25%, 96%);
  --accent-foreground: hsl(0, 25%, 33%);
  --destructive: hsl(0, 82%, 67%);
  --destructive-foreground: hsl(48, 33%, 98%);
  --border: hsl(0, 14%, 94%);
  --input: hsl(214, 27%, 91%);
  --ring: hsl(0, 25%, 33%);
}

[data-theme='dark'] {
  /* === Dark Mode === */
  --background: hsl(0, 25%, 6%);
  --foreground: hsl(48, 33%, 98%);
  --card: hsl(0, 25%, 6%);
  --card-foreground: hsl(48, 33%, 98%);
  --popover: hsl(0, 25%, 6%);
  --popover-foreground: hsl(48, 33%, 98%);
  --primary: hsl(48, 33%, 98%);
  --primary-foreground: hsl(0, 25%, 33%);
  --secondary: hsl(0, 22%, 14%);
  --secondary-foreground: hsl(48, 33%, 98%);
  --muted: hsl(0, 22%, 14%);
  --muted-foreground: hsl(0, 20%, 75%);
  --accent: hsl(0, 22%, 14%);
  --accent-foreground: hsl(48, 33%, 98%);
  --destructive: hsl(0, 82%, 67%);
  --destructive-foreground: hsl(48, 33%, 98%);
  --border: hsl(0, 22%, 14%);
  --input: hsl(0, 22%, 14%);
  --ring: hsl(0, 25%, 33%);
}

2. Font Families

/* Import custom fonts */
@font-face {
  font-family: 'Instrument Serif';
  src: url('./references/InstrumentSerif-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
}

@font-face {
  font-family: 'Instrument Serif';
  src: url('./references/InstrumentSerif-Italic.ttf') format('truetype');
  font-weight: 400;
  font-style: italic;
}

/* Typography Rules */
/* Paragraph and text content */
p, .text-body, .text-content {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Headings */
h1, h2, h3, h4, h5, h6,
.heading-1, .heading-2, .heading-3, .heading-4, .heading-5, .heading-6 {
  font-family: 'Instrument Serif', Georgia, 'Times New Roman', serif;
  font-weight: 400;
}

/* Prepositions in headings should use italic */
h1 .preposition, h2 .preposition, h3 .preposition,
h4 .preposition, h5 .preposition, h6 .preposition,
.heading-1 .preposition, .heading-2 .preposition, .heading-3 .preposition,
.heading-4 .preposition, .heading-5 .preposition, .heading-6 .preposition {
  font-style: italic;
}

3. Typography Scale

.text-xxs { font-size: 8px; }   /* Micro text */
.text-xs  { font-size: 10px; }  /* Caption */
.text-sm  { font-size: 12px; }  /* Secondary text */
.text-base { font-size: 14px; } /* Default body */
.text-lg  { font-size: 16px; }  /* Paragraph */
.display-xl { font-size: 60px; } /* Hero headings */

4. Spacing System (4px base unit)

.space-1 { margin: 4px; }   /* XS */
.space-2 { margin: 8px; }   /* SM */
.space-3 { margin: 12px; }  /* MD */
.space-4 { margin: 16px; }  /* LG - Component spacing */
.space-6 { margin: 24px; }  /* Standard spacing */
.space-8 { margin: 32px; }  /* Section padding */
.space-16 { margin: 64px; } /* Large sections */

Responsive Design Strategy

1. Breakpoint System

/* Mobile-first approach */
sm: '640px',   /* Small devices */
md: '768px',   /* Tablets */
lg: '1024px',  /* Laptops */
xl: '1280px',  /* Desktops */
2xl: '1536px'  /* Large screens */

2. Component Responsiveness

// Example: Responsive grid
<div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
  {/* Cards automatically adapt */}
</div>

// Custom mobile hook
const isMobile = useIsMobile(); // 768px breakpoint

3. Sidebar Adaptation

// Desktop: Collapsible sidebar
// Mobile: Transforms to sheet/drawer
{isMobile ? (
  <Sheet open={openMobile} onOpenChange={setOpenMobile}>
    <SheetContent side="left" className="p-0">
      <SidebarContent />
    </SheetContent>
  </Sheet>
) : (
  <Sidebar className={cn(
    "transition-all duration-300",
    state === "collapsed" ? "w-[48px]" : "w-[256px]"
  )}>
    <SidebarContent />
  </Sidebar>
)}

Accessibility Implementation

1. ARIA Patterns

// Proper ARIA labeling
<button
  aria-label="Close dialog"
  aria-expanded={isOpen}
  aria-controls="dialog-content"
>
  <X className="h-4 w-4" />
</button>

// Form accessibility
<label htmlFor="email" className="sr-only">
  Email address
</label>
<input
  id="email"
  type="email"
  aria-describedby="email-description"
  aria-invalid={hasError}
/>
<div id="email-description" className="text-sm text-muted-foreground">
  We'll never share your email
</div>

2. Keyboard Navigation

// Custom keyboard event handling
useEffect(() => {
  const handleKeyDown = (event: KeyboardEvent) => {
    if (event.key === 'Escape') {
      onClose();
    }
    if (event.key === 'Enter' || event.key === ' ') {
      onActivate();
    }
  };

  document.addEventListener('keydown', handleKeyDown);
  return () => document.removeEventListener('keydown', handleKeyDown);
}, [onClose, onActivate]);

3. Focus Management

// Focus trap for modals
import { FocusTrap } from '@radix-ui/react-focus-trap';

<FocusTrap asChild>
  <div className="modal-content">
    {/* Modal content with proper focus order */}
  </div>
</FocusTrap>

Form Architecture

1. React Hook Form Integration

import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import * as z from "zod";

const formSchema = z.object({
  email: z.string().email("Invalid email address"),
  password: z.string().min(8, "Password must be at least 8 characters"),
});

type FormData = z.infer<typeof formSchema>;

const form = useForm<FormData>({
  resolver: zodResolver(formSchema),
  defaultValues: {
    email: "",
    password: "",
  },
});

2. Form Field Component Pattern

<FormField
  control={form.control}
  name="email"
  render={({ field }) => (
    <FormItem>
      <FormLabel>Email</FormLabel>
      <FormControl>
        <Input placeholder="Enter your email" {...field} />
      </FormControl>
      <FormDescription>
        We'll use this to send you updates
      </FormDescription>
      <FormMessage />
    </FormItem>
  )}
/>

State Management Patterns

1. Component State

// Local state for UI interactions
const [isOpen, setIsOpen] = useState(false);
const [selectedItems, setSelectedItems] = useState<string[]>([]);

// Derived state
const hasSelection = selectedItems.length > 0;
const allSelected = selectedItems.length === items.length;

2. Context for Shared State

// Theme context
const ThemeContext = createContext<{
  theme: Theme;
  setTheme: (theme: Theme) => void;
} | null>(null);

// Sidebar context
const SidebarContext = createContext<{
  state: "expanded" | "collapsed";
  open: boolean;
  setOpen: (open: boolean) => void;
  isMobile: boolean;
} | null>(null);

3. URL State Management

// For filters, search, pagination
const [searchParams, setSearchParams] = useSearchParams();

const currentPage = Number(searchParams.get('page')) || 1;
const searchQuery = searchParams.get('q') || '';

const updateFilters = (filters: Record<string, string>) => {
  const newParams = new URLSearchParams(searchParams);
  Object.entries(filters).forEach(([key, value]) => {
    if (value) {
      newParams.set(key, value);
    } else {
      newParams.delete(key);
    }
  });
  setSearchParams(newParams);
};

Performance Optimization

1. Code Splitting

// Lazy loading for routes
const Dashboard = lazy(() => import('./pages/Dashboard'));
const Settings = lazy(() => import('./pages/Settings'));

// Wrap in Suspense
<Suspense fallback={<LoadingSpinner />}>
  <Routes>
    <Route path="/dashboard" element={<Dashboard />} />
    <Route path="/settings" element={<Settings />} />
  </Routes>
</Suspense>

2. Memoization

// Expensive calculations
const processedData = useMemo(() => {
  return data.map(item => ({
    ...item,
    computed: expensiveComputation(item)
  }));
}, [data]);

// Callback memoization
const handleItemClick = useCallback((id: string) => {
  setSelectedItems(prev =>
    prev.includes(id)
      ? prev.filter(item => item !== id)
      : [...prev, id]
  );
}, []);

// Component memoization
const MemoizedTableRow = memo(TableRow);

3. Virtual Scrolling (for large lists)

import { FixedSizeList as List } from 'react-window';

const VirtualizedTable = ({ items }: { items: any[] }) => {
  const Row = ({ index, style }: { index: number; style: React.CSSProperties }) => (
    <div style={style}>
      <TableRow data={items[index]} />
    </div>
  );

  return (
    <List
      height={600}
      itemCount={items.length}
      itemSize={50}
      width="100%"
    >
      {Row}
    </List>
  );
};

Testing Patterns

1. Component Testing

import { render, screen, fireEvent } from '@testing-library/react';
import { Button } from './button';

describe('Button', () => {
  it('renders with correct variant styles', () => {
    render(<Button variant="destructive">Delete</Button>);
    const button = screen.getByRole('button');
    expect(button).toHaveClass('bg-destructive');
  });

  it('handles click events', () => {
    const handleClick = jest.fn();
    render(<Button onClick={handleClick}>Click me</Button>);
    fireEvent.click(screen.getByRole('button'));
    expect(handleClick).toHaveBeenCalledTimes(1);
  });
});

2. Accessibility Testing

import { axe, toHaveNoViolations } from 'jest-axe';

expect.extend(toHaveNoViolations);

it('should not have accessibility violations', async () => {
  const { container } = render(<MyComponent />);
  const results = await axe(container);
  expect(results).toHaveNoViolations();
});

This implementation guide provides the foundation for building consistent, accessible, and performant applications using the Backstage Design System.