Tech Blog
Frontend deep dives, architecture design, performance optimization, and development insights
Content Security Policy Deep Dive: From XSS Defense to strict-dynamic
A systematic guide to CSP directives, nonce/hash alternatives to unsafe-inline, the strict-dynamic trust chain propagation mechanism, and CSP violation reporting configuration.
CSS :has() Selector in Practice: The Parent Selector That Changes Component Styling Architecture
A comprehensive guide to the CSS :has() selector's syntax and matching logic, with practical examples for form validation, card layouts, and nav highlighting that replace JavaScript.
Browser Storage Compared: localStorage, IndexedDB, Cache API, and OPFS
A comprehensive comparison of five browser storage mechanisms — localStorage, sessionStorage, IndexedDB, Cache API, and OPFS — covering capacity, performance, API style, and use cases.
Structured Data and JSON-LD: A Complete Guide to SEO Rich Snippets
From Schema.org vocabulary to JSON-LD embedding, a comprehensive guide to implementing Article, FAQ, HowTo, and BreadcrumbList structured data for Google Rich Results.
Web Animations API and High-Performance Animation: GPU Acceleration and Composite Optimization
Deep comparison of Web Animations API vs CSS animations, covering transform/opacity GPU acceleration, will-change best practices, and composite layer optimization strategies.
ResizeObserver and Container Queries: Element-Level Responsive Layout Solutions
Systematic guide to ResizeObserver API and CSS Container Queries for element-level responsive layouts independent of the viewport, compared with traditional media queries.
Advanced Service Worker: Offline-First Architecture and Background Sync Strategies
Deep dive into Service Worker offline-first architecture design, covering Cache API strategies, Background Sync, Push API notifications, and Workbox best practices.
Clipboard API in Practice: Browser Clipboard Read/Write and Security Policies
Comprehensive guide to the browser Clipboard API covering text and rich-text read/write, custom MIME types, permission models, and security policies, compared with document.execCommand.
Web Security Defense in Practice: A Comprehensive Defense System for XSS, CSRF, SSRF & Clickjacking
From attack principles to defense code, this guide covers all four major web security threats — XSS, CSRF, SSRF, and Clickjacking — and helps you build a defense-in-depth system.
WebAuthn and Passkeys: A Complete Hands-On Guide to Passwordless Authentication in the Post-Password Era
From FIDO2/WebAuthn protocol fundamentals to complete Passkey registration and authentication code implementations, covering platform authenticators vs roaming authenticators, public-key cryptography flow, multi-device sync, fallback strategies, and 2026 browser and platform support status.
TypeScript 5 Decorators & Metaprogramming: From Principles to a Complete Dependency Injection Framework
A deep dive into TypeScript 5 Stage 3 decorators, differences from legacy decorators, the Reflect.metadata mechanism, and building an IoC container, ORM mapping, and validation framework from scratch with decorators.
Rust + WebAssembly: Boosting Frontend Compute Performance by 20x in Practice
From the complete Rust-to-WASM compilation workflow, dive deep into wasm-pack, wasm-bindgen practical configuration, compare JS vs WASM performance in image processing, encryption, compression scenarios, and explore WASM architecture applications in tool libraries.
React Concurrent Rendering in Practice: The Right Way to Use useTransition, useDeferredValue, and Suspense
A deep dive into the core APIs of React concurrent rendering—the principles and practical usage of useTransition, useDeferredValue, and Suspense. Covers large list filtering, async data loading, streaming SSR, priority scheduling, and common performance pitfalls with mitigation strategies.
Node.js Performance Analysis and Tuning in Practice: A Complete Troubleshooting Path for Flame Graphs, Memory Leaks, and Event Loop Blocking
A systematic walkthrough of the complete Node.js performance analysis toolchain, covering 0x/clinic.js flame graph generation, V8 heap snapshots and heap comparison, event loop latency monitoring, CPU profiling, and continuous performance monitoring in production.
IntersectionObserver in Practice: Lazy Loading, Infinite Scroll, and Viewport Detection
A systematic guide to the IntersectionObserver API covering lazy loading, infinite scroll, virtual lists, and exposure tracking, with performance comparisons against traditional scroll listeners.
Frontend Error Monitoring Complete Guide: Sentry, SourceMap, and User-Transparent Exception Capture
From global error capture to SourceMap deobfuscation, from Sentry integration to building your own monitoring system — master the complete chain of frontend exception monitoring.
Edge Computing × Frontend: Make Your Site Blazing Fast with Cloudflare Workers/Vercel Edge
An in-depth analysis of edge computing in frontend applications, covering practical comparisons of Cloudflare Workers, Vercel Edge Functions, and Deno Deploy, classic scenarios like A/B testing, personalization, and Geo routing, plus a complete migration path from traditional architectures.
Design System Architecture in Practice: The Complete Build Path from Design Tokens to Component Libraries
A systematic exploration of design system architecture, covering Design Token systems (colors/spacing/typography/shadows), component API design principles, theme switching mechanisms, multi-brand adaptation, and engineering practices with Tailwind CSS + CSS variables.
CSS Scroll-Driven Animations: Zero-JS Parallax Scrolling, Progress Bars, and Reveal Effects
A comprehensive guide to CSS scroll-timeline and view-timeline syntax. Create classic effects like parallax scrolling, reading progress bars, scroll reveals, and horizontal scrolling with pure CSS — say goodbye to scroll event listeners and requestAnimationFrame.
CSS Container Queries Definitive Guide: The Ultimate Component-Level Responsive Design Solution
Break free from the page-level limitations of media queries. Use container queries to achieve true component-level responsive design, allowing components to adapt their layout within any container.