Frontend Coding

Overview

Expert frontend development guidance covering React, Vue, Angular, TypeScript, state management, component architecture, performance optimization, accessibility, testing, and modern web APIs.

Core Capabilities

1. Framework Expertise - React, Vue, Angular, Svelte
2. TypeScript - Type-safe development
3. State Management - Redux, Vuex, Pinia, Context API
4. Component Patterns - Composition, hooks, composables
5. Performance - Code splitting, lazy loading, optimization
6. Accessibility - WCAG compliance, ARIA
7. Testing - Jest, Testing Library, Cypress

Quick Start

React Component Example:

import React, { useState, useEffect } from 'react';

interface User {
  id: number;
  name: string;
}

export const UserList: React.FC = () => {
  const [users, setUsers] = useState<User[]>([]);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    fetch('/api/users')
      .then(res => res.json())
      .then(data => {
        setUsers(data);
        setLoading(false);
      });
  }, []);

  if (loading) return <div>Loading...</div>;

  return (
    <ul>
      {users.map(user => (
        <li key={user.id}>{user.name}</li>
      ))}
    </ul>
  );
};

Critical Tips

1. Use TypeScript - Type safety prevents runtime errors
2. Component composition - Build reusable, composable components
3. Performance matters - Memoization, lazy loading, code splitting
4. Accessibility first - WCAG compliance from the start
5. Test thoroughly - Unit, integration, E2E testing

Framework-Specific Guidance

React Development - See react-development.md for:

• Functional components and hooks (useState, useEffect, useCallback, useMemo)
• Custom hooks and composition patterns
• Context API and prop drilling solutions
• React Server Components and Next.js

React Advanced Patterns - See react-patterns.md for:

• Custom hooks patterns (data fetching, form handling, debouncing)
• Higher-order components (HOC) and render props
• Compound components and controlled/uncontrolled patterns
• Error boundaries and suspense

Vue.js Development - See vuejs-development.md for:

• Composition API and Options API
• Composables and reactivity system
• Vue Router, Pinia state management
• Nuxt.js and server-side rendering

Vue Advanced Patterns - See vue-patterns.md for:

• Composables organization and reusability
• Provide/inject pattern and plugin development
• Custom directives and render functions
• Advanced reactivity patterns

Cross-Framework Topics

Component Patterns - See component-patterns.md for:

• Compound components (tabs, accordions, modals)
• Render props and slots patterns
• Controlled vs uncontrolled components
• Container/presentational component separation

State Management - See state-management.md for:

• Redux, Zustand, Jotai (React)
• Pinia, Vuex (Vue)
• NgRx, Akita (Angular)
• Server state management (React Query, SWR, TanStack Query)

TypeScript Best Practices - See typescript-best-practices.md for:

• Type safety, inference, and utility types
• Generics and advanced type patterns
• Type guards and narrowing
• Framework-specific TypeScript patterns

Best Practices - See best-practices.md for:

• Project structure and code organization
• Naming conventions and file naming
• Testing strategies (unit, integration, E2E)
• Security best practices (XSS, CSRF, input validation)

Performance & Accessibility - See performance-testing.md for:

• Code splitting and lazy loading
• Bundle optimization and tree shaking
• Performance monitoring and profiling
• WCAG compliance and accessibility testing