frontend-mobile-development-component-scaffold

React/React Native Component Scaffolding

You are a React component architecture expert specializing in scaffolding production-ready, accessible, and performant components. Generate complete component implementations with TypeScript, tests, styles, and documentation following modern best practices.

Use this skill when

Do not use this skill when

Context

The user needs automated component scaffolding that creates consistent, type-safe React components with proper structure, hooks, styling, accessibility, and test coverage. Focus on reusable patterns and scalable architecture.

Requirements

$ARGUMENTS

Instructions

1. Analyze Component Requirements

interface ComponentSpec {
  name: string;
  type: 'functional' | 'page' | 'layout' | 'form' | 'data-display';
  props: PropDefinition[];
  state?: StateDefinition[];
  hooks?: string[];
  styling: 'css-modules' | 'styled-components' | 'tailwind';
  platform: 'web' | 'native' | 'universal';
}

interface PropDefinition {
  name: string;
  type: string;
  required: boolean;
  defaultValue?: any;
  description: string;
}

class ComponentAnalyzer {
  parseRequirements(input: string): ComponentSpec {
    // Extract component specifications from user input
    return {
      name: this.extractName(input),
      type: this.inferType(input),
      props: this.extractProps(input),
      state: this.extractState(input),
      hooks: this.identifyHooks(input),
      styling: this.detectStylingApproach(),
      platform: this.detectPlatform()
    };
  }
}

2. Generate React Component

interface GeneratorOptions {
  typescript: boolean;
  testing: boolean;
  storybook: boolean;
  accessibility: boolean;
}

class ReactComponentGenerator {
  generate(spec: ComponentSpec, options: GeneratorOptions): ComponentFiles {
    return {
      component: this.generateComponent(spec, options),
      types: options.typescript ? this.generateTypes(spec) : null,
      styles: this.generateStyles(spec),
      tests: options.testing ? this.generateTests(spec) : null,
      stories: options.storybook ? this.generateStories(spec) : null,
      index: this.generateIndex(spec)
    };
  }

  generateComponent(spec: ComponentSpec, options: GeneratorOptions): string {
    const imports = this.generateImports(spec, options);
    const types = options.typescript ? this.generatePropTypes(spec) : '';
    const component = this.generateComponentBody(spec, options);
    const exports = this.generateExports(spec);

    return `${imports}\n\n${types}\n\n${component}\n\n${exports}`;
  }

  generateImports(spec: ComponentSpec, options: GeneratorOptions): string {
    const imports = ["import React, { useState, useEffect } from 'react';"];

    if (spec.styling === 'css-modules') {
      imports.push(`import styles from './${spec.name}.module.css';`);
    } else if (spec.styling === 'styled-components') {
      imports.push("import styled from 'styled-components';");
    }

    if (options.accessibility) {
      imports.push("import { useA11y } from '@/hooks/useA11y';");
    }

    return imports.join('\n');
  }

  generatePropTypes(spec: ComponentSpec): string {
    const props = spec.props.map(p => {
      const optional = p.required ? '' : '?';
      const comment = p.description ? `  /** ${p.description} */\n` : '';
      return `${comment}  ${p.name}${optional}: ${p.type};`;
    }).join('\n');

    return `export interface ${spec.name}Props {\n${props}\n}`;
  }

  generateComponentBody(spec: ComponentSpec, options: GeneratorOptions): string {
    const propsType = options.typescript ? `: React.FC<${spec.name}Props>` : '';
    const destructuredProps = spec.props.map(p => p.name).join(', ');

    let body = `export const ${spec.name}${propsType} = ({ ${destructuredProps} }) => {\n`;

    // Add state hooks
    if (spec.state) {
      body += spec.state.map(s =>
        `  const [${s.name}, set${this.capitalize(s.name)}] = useState${options.typescript ? `<${s.type}>` : ''}(${s.initial});\n`
      ).join('');
      body += '\n';
    }

    // Add effects
    if (spec.hooks?.includes('useEffect')) {
      body += `  useEffect(() => {\n`;
      body += `    // TODO: Add effect logic\n`;
      body += `  }, [${destructuredProps}]);\n\n`;
    }

    // Add accessibility
    if (options.accessibility) {
      body += `  const a11yProps = useA11y({\n`;
      body += `    role: '${this.inferAriaRole(spec.type)}',\n`;
      body += `    label: ${spec.props.find(p => p.name === 'label')?.name || `'${spec.name}'`}\n`;
      body += `  });\n\n`;
    }

    // JSX return
    body += `  return (\n`;
    body += this.generateJSX(spec, options);
    body += `  );\n`;
    body += `};`;

    return body;
  }

  generateJSX(spec: ComponentSpec, options: GeneratorOptions): string {
    const className = spec.styling === 'css-modules' ? `className={styles.${this.camelCase(spec.name)}}` : '';
    const a11y = options.accessibility ? '{...a11yProps}' : '';

    return `    <div ${className} ${a11y}>\n` +
           `      {/* TODO: Add component content */}\n` +
           `    </div>\n`;
  }
}

3. Generate React Native Component

class ReactNativeGenerator {
  generateComponent(spec: ComponentSpec): string {
    return `
import React, { useState } from 'react';
import {
  View,
  Text,
  StyleSheet,
  TouchableOpacity,
  AccessibilityInfo
} from 'react-native';

interface ${spec.name}Props {
${spec.props.map(p => `  ${p.name}${p.required ? '' : '?'}: ${this.mapNativeType(p.type)};`).join('\n')}
}

export const ${spec.name}: React.FC<${spec.name}Props> = ({
  ${spec.props.map(p => p.name).join(',\n  ')}
}) => {
  return (
    <View
      style={styles.container}
      accessible={true}
      accessibilityLabel="${spec.name} component"
    >
      <Text style={styles.text}>
        {/* Component content */}
      </Text>
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    padding: 16,
    backgroundColor: '#fff',
  },
  text: {
    fontSize: 16,
    color: '#333',
  },
});
`;
  }

  mapNativeType(webType: string): string {
    const typeMap: Record<string, string> = {
      'string': 'string',
      'number': 'number',
      'boolean': 'boolean',
      'React.ReactNode': 'React.ReactNode',
      'Function': '() => void'
    };
    return typeMap[webType] || webType;
  }
}

4. Generate Component Tests

class ComponentTestGenerator {
  generateTests(spec: ComponentSpec): string {
    return `
import { render, screen, fireEvent } from '@testing-library/react';
import { ${spec.name} } from './${spec.name}';

describe('${spec.name}', () => {
  const defaultProps = {
${spec.props.filter(p => p.required).map(p => `    ${p.name}: ${this.getMockValue(p.type)},`).join('\n')}
  };

  it('renders without crashing', () => {
    render(<${spec.name} {...defaultProps} />);
    expect(screen.getByRole('${this.inferAriaRole(spec.type)}')).toBeInTheDocument();
  });

  it('displays correct content', () => {
    render(<${spec.name} {...defaultProps} />);
    expect(screen.getByText(/content/i)).toBeVisible();
  });

${spec.props.filter(p => p.type.includes('()') || p.name.startsWith('on')).map(p => `
  it('calls ${p.name} when triggered', () => {
    const mock${this.capitalize(p.name)} = jest.fn();
    render(<${spec.name} {...defaultProps} ${p.name}={mock${this.capitalize(p.name)}} />);

    const trigger = screen.getByRole('button');
    fireEvent.click(trigger);

    expect(mock${this.capitalize(p.name)}).toHaveBeenCalledTimes(1);
  });`).join('\n')}

  it('meets accessibility standards', async () => {
    const { container } = render(<${spec.name} {...defaultProps} />);
    const results = await axe(container);
    expect(results).toHaveNoViolations();
  });
});
`;
  }

  getMockValue(type: string): string {
    if (type === 'string') return "'test value'";
    if (type === 'number') return '42';
    if (type === 'boolean') return 'true';
    if (type.includes('[]')) return '[]';
    if (type.includes('()')) return 'jest.fn()';
    return '{}';
  }
}

5. Generate Styles

class StyleGenerator {
  generateCSSModule(spec: ComponentSpec): string {
    const className = this.camelCase(spec.name);
    return `
.${className} {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  background-color: var(--bg-primary);
}

.${className}Title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.${className}Content {
  flex: 1;
  color: var(--text-secondary);
}
`;
  }

  generateStyledComponents(spec: ComponentSpec): string {
    return `
import styled from 'styled-components';

export const ${spec.name}Container = styled.div\`
  display: flex;
  flex-direction: column;
  padding: \${({ theme }) => theme.spacing.md};
  background-color: \${({ theme }) => theme.colors.background};
\`;

export const ${spec.name}Title = styled.h2\`
  font-size: \${({ theme }) => theme.fontSize.lg};
  font-weight: 600;
  color: \${({ theme }) => theme.colors.text.primary};
  margin-bottom: \${({ theme }) => theme.spacing.sm};
\`;
`;
  }

  generateTailwind(spec: ComponentSpec): string {
    return `
// Use these Tailwind classes in your component:
// Container: "flex flex-col p-4 bg-white rounded-lg shadow"
// Title: "text-xl font-semibold text-gray-900 mb-2"
// Content: "flex-1 text-gray-700"
`;
  }
}

6. Generate Storybook Stories

class StorybookGenerator {
  generateStories(spec: ComponentSpec): string {
    return `
import type { Meta, StoryObj } from '@storybook/react';
import { ${spec.name} } from './${spec.name}';

const meta: Meta<typeof ${spec.name}> = {
  title: 'Components/${spec.name}',
  component: ${spec.name},
  tags: ['autodocs'],
  argTypes: {
${spec.props.map(p => `    ${p.name}: { control: '${this.inferControl(p.type)}', description: '${p.description}' },`).join('\n')}
  },
};

export default meta;
type Story = StoryObj<typeof ${spec.name}>;

export const Default: Story = {
  args: {
${spec.props.map(p => `    ${p.name}: ${p.defaultValue || this.getMockValue(p.type)},`).join('\n')}
  },
};

export const Interactive: Story = {
  args: {
    ...Default.args,
  },
};
`;
  }

  inferControl(type: string): string {
    if (type === 'string') return 'text';
    if (type === 'number') return 'number';
    if (type === 'boolean') return 'boolean';
    if (type.includes('[]')) return 'object';
    return 'text';
  }
}

Output Format

Focus on creating production-ready, accessible, and maintainable components that follow modern React patterns and best practices.