Tech Blog
Frontend deep dives, architecture design, performance optimization, and development insights
pdf-lib Architecture: Pure JavaScript PDF Create, Edit, and Merge
A source-level tour of pdf-lib—PDF object model, cross-reference tables, stream compression, font embedding—and how ToolsKu builds 20+ PDF tools on top of it.
HTTP/3 and QUIC Protocol Deep Dive: Why Web Transport Is Abandoning TCP
From TCP head-of-line blocking to QUIC multiplexing, from 0-RTT handshakes to connection migration, a comprehensive understanding of how HTTP/3 solves HTTP/2's legacy issues.
How WebAssembly Is Reshaping Browser-Side Compute: From FFmpeg.wasm to OxiPNG
A deep dive into running native C/Rust in the browser via WebAssembly, with real-world performance and architecture lessons from FFmpeg.wasm video transcoding and OxiPNG image compression.
Frontend Performance Metrics: LCP, FID, CLS, and Core Web Vitals
How LCP, FID, INP, and CLS are measured and optimized, with real-world lessons from the ToolsKu site for building fast web apps.
JavaScript Memory Leak Debugging in Practice: A Complete Pipeline from Chrome DevTools to Automated Detection
Systematically catalog common frontend memory leak patterns, master Chrome DevTools Memory panel techniques, and build automated memory leak detection workflows.
Micro-Frontend Architecture in Practice: Module Federation, qiankun, and Custom Solutions — Selection and Implementation
From iframe isolation to Module Federation 2.0, comprehensively compare the pros and cons of micro-frontend solutions, and master enterprise-grade micro-frontend architecture design and implementation.
Node.js Stream Processing in Practice: A Complete Guide to Readable, Writable, Transform, and Backpressure
From basic stream concepts to backpressure control, from file processing to HTTP response streaming, master the core principles and production-grade usage of Node.js Streams.
React 19 New Features Complete Guide: Actions, use(), Server Components, and Compiler Optimizations
An in-depth look at React 19's core new features, including Form Actions, the use() Hook, improved Server Components, React Compiler auto-optimizations, and migration considerations.
Tailwind CSS v4 Migration Complete Guide: New Engine, CSS-First Configuration, and Performance Leap
A complete migration path from v3 to v4, covering the new engine architecture, CSS-first configuration, automatic content detection, container query support, and common migration pitfalls.