HK Lee

Master React 19's revolutionary use() hook. Learn how it transforms async data fetching, replaces useEffect patterns, and works with Suspense for cleaner, more readable React code.

HK Lee

Bun 1.2 ships with native SQLite, S3 client, and Postgres support. No npm install required. We tested real-world scenarios to see if Bun is finally ready to replace Node.js in production.

HK Lee

Deep dive into prompt injection vulnerabilities that threaten your AI applications. Learn direct and indirect attack vectors, real-world exploit patterns, defense-in-depth strategies, and production-ready security implementations to protect your LLM-powered systems.

HK Lee

TypeScript 5.5 introduces automatic type guard inference that eliminates thousands of lines of boilerplate. Learn how Inferred Type Predicates work, when they trigger, and how this changes the way you write TypeScript forever.

HK Lee

Your React app feels sluggish and you don't know why. Learn the exact patterns causing unnecessary re-renders, how to identify them with React DevTools, and battle-tested strategies that reduced our render count by 80%.

HK Lee

Your React app freezes during heavy computations. Users rage-quit. The main thread is crying. Learn how to offload expensive operations to Web Workers and make your UI buttery smooth again.

HK Lee

A deep dive into why your Next.js API routes and serverless functions break when switching to Edge Runtime. Learn the fundamental differences, common pitfalls, debugging strategies, and when to use each runtime.

HK Lee

Discover the hidden patterns behind AI-generated code failures in production environments. Learn systematic debugging strategies, common pitfalls, and prevention techniques that every developer needs in 2026.

HK Lee

A comprehensive guide to Claude Code, Anthropic's powerful terminal-native AI coding agent. Learn setup, advanced workflows, practical use cases, and how it compares to Cursor and GitHub Copilot for complex development tasks.

HK Lee

Deep dive into the critical React 19 Server Actions vulnerabilities including CVE-2025-55182 (CVSS 10.0 RCE), CVE-2025-55183, and CVE-2025-55184. Learn exactly how these exploits work, check if you're vulnerable, and implement comprehensive security hardening.

HK Lee

Everything you need to know about Turbopack, the Rust-based successor to Webpack. Performance benchmarks, migration from Webpack, configuration deep dive, and production readiness assessment for Next.js 15.

HK Lee

A deep dive into Biome, the ultra-fast Rust-based linter and formatter replacing ESLint + Prettier. Learn migration strategies, performance benchmarks, plugin compatibility, and whether it's ready for your production codebase.

HK Lee

Master the art of vibe coding with AI assistants. Learn practical workflows, prompt engineering for code, when to trust AI output, and how senior developers are 10xing their productivity in 2026.

HK Lee

Complete guide to migrating from ESLint 9 to ESLint 10. Covers Node.js 20+ requirement, complete .eslintrc removal, new config lookup, JSX tracking, and all breaking changes.

HK Lee

Master GitHub Actions with advanced patterns for monorepos, matrix builds, self-hosted runners, and cost optimization. Real-world examples and troubleshooting included.

HK Lee

An in-depth comparison of the top TypeScript schema validation libraries. Bundle size, runtime performance, type inference, and real-world use cases analyzed.

HK Lee

Master the hidden traps of JavaScript async programming. Deep dive into memory leaks, unhandled rejections, race conditions, and the subtle bugs that even senior developers miss.

HK Lee

A comprehensive comparison of JavaScript package managers in 2026. Benchmarks, disk usage, monorepo support, security features, and migration guides for pnpm, npm, yarn, and Bun's package manager.

HK Lee

A comprehensive comparison of OpenAI GPT-5, Anthropic Claude Opus 4.5, and Google Gemini 3 for developers. Benchmark analysis, real-world coding tests, pricing, and which model to choose for different use cases in 2026.

HK Lee

Master the Vercel AI SDK to build streaming AI chat applications with Next.js. Learn useChat, useCompletion, AI SDK Core, multi-provider integration, and production deployment patterns with practical code examples.

HK Lee

A comprehensive deep dive into Cursor AI's .cursorrules file and Memory Bank system. Learn how to configure project-specific AI behavior, maintain context across sessions, and supercharge your development workflow with advanced prompt engineering techniques.

HK Lee

Tailwind v4 rewrote everything—new engine, CSS-first config, no PostCSS plugin. Here's the complete migration guide with before/after code and gotchas we learned the hard way.

HK Lee

Tired of biased database comparisons? We break down when to actually use PostgreSQL, MySQL, or MongoDB based on real-world use cases, performance data, and developer experience in 2026.

HK Lee

Coming from JavaScript or TypeScript? Learn Rust the right way. We cover ownership, borrowing, and lifetimes without the academic jargon—with side-by-side JS comparisons.

HK Lee

Stale data driving you crazy? Master the 4 hidden cache layers in Next.js 15/16, debug like a pro, and finally understand why revalidate isn't doing what you think.

HK Lee

Master the CSS :has() selector with practical examples, performance tips, and real-world use cases. Learn how this game-changing feature eliminates JavaScript for common UI patterns.

HK Lee

An in-depth analysis of the three major JavaScript runtimes. Benchmarks, migration guides, and practical recommendations for choosing the right runtime for your project.

HK Lee

Learn how MCP is revolutionizing AI agent development. From architecture deep-dive to production implementation, this guide covers everything you need to build robust AI agents that connect to any data source.

HK Lee

Master the differences between Vite and Webpack. Learn when to migrate, how to handle edge cases, and understand the architectural decisions that make Vite up to 100x faster in development.

HK Lee

Master advanced Docker build optimization techniques. Learn BuildKit secrets, layer caching strategies, multistage patterns, and reduce your build times from 15 minutes to under 60 seconds.