shdev.blog

You May or May Not Be Able to Draw 0.5px (feat. DPR)

Why a 0.5px border appears on some devices but not on others. Understanding Device Pixel Ratio (DPR) makes it clear.

November 29, 2025

Why I Removed index.ts (Barrel) Files

I used barrel files to make imports look neat. Why they caused issues, what changed after removing them, and the cases where I still keep them.

TypeScriptJavaScriptRefactoring

11/14/2025

Troubleshooting a Memory Leak Caused by THREE.Cache.enabled

I looked into how THREE.Cache, enabled to optimize GLTFLoader performance, ended up causing a memory leak in a dynamic URL environment.

Three.js

08/25/2025

Understanding How Zustand Works (with Closure)

By analyzing Zustand’s source code, we uncover the core principles of state management powered by closures—and the secrets behind a powerful state library implemented in roughly 100 lines.

JavaScriptZustand

08/08/2025

Diving Deep into JWT

I revisited the widely used authentication method JWT (JSON Web Token) from its background to structure and operating principles, reconsidering why and how it should be used.

WebSecurity

07/29/2025