Frontend, backend and devops for the modern web.
You trace a bug through three files only to find that a harmless helper function renamed a user. You never touched the original. Or so you thought. In JavaScript, assigning one va…
Every program needs to react. A user clicks a button. An API returns data. A form field goes blank. Without a way to branch, your code would run line by line regardless of what is…
If you have spent any time in React, you have seen the yellow warning in your console: “Each child in a list should have a unique ‘key’ prop.” It sounds like a polite suggestion,…
Uploading a two gigabyte video over coffee shop WiFi is an exercise in optimism. You watch the progress bar crawl toward seventy percent, and then the connection flickers. The upl…
벤치마크의 함정. 벤치마크 수치를 내세우는 이들은 결코 전체 그림을 보여주지 않습니다. 그들은 거의 아무것도 하지 않는 핸들러를 측정합니다. JSON Hello World나 정적 문자열 같은 것 말이죠. 그런 진공 상태에서, Fiber는...
The first chatbot draft landed in a teacher’s inbox roughly two years ago, and the situation has only accelerated since. A student can now ask ChatGPT to produce five paragraphs o…
React gives you two ways to keep data alive inside a component: and . At a glance they look similar. Both return something you can read, both survive re renders, and both let you…
You open a fresh document. You type “Chapter One.” Then you stare at the screen for twenty minutes. You have a hook. You have the spark. But you have no plan. That blank screen is…
If you have ever pushed a two line bugfix to a TypeScript monorepo and watched your build pipeline chew through ten minutes of type checking, you already understand the problem. T…
Google has rolled out what it calls its biggest search upgrade in 25 years. That claim sounds like the usual tech hyperbole until you stop and look at what actually changed. The n…
You have Claude Code installed. You have figured out the basics, written a few prompts, and maybe even created a file in your project root. Then the moment arrives. You watch Clau…
링크 혼동 없이 React에서 이메일 변경 흐름 테스트하기. 계정 이메일을 변경하는 작업은 사소해 보일 수 있지만, 실제로는 테스트 오류가 빈번하게 발생하는 주요 원인입니다. 테스터들은 종종 확인...
브라우저에서 CAD 에디터를 만들고, LLM에게 사용법을 가르쳤습니다. 앱에 "문과 창문이 몇 개 있나요?"라고 물었더니, AI는 개수를 답한 뒤 무언가를 덧붙였습니다...
OAUTH HISTORY: FROM PASSWORDS TO GLOBAL STANDARDS You see it every day. You click "Login with Google" or "Login with GitHub." You do not type a password. You enter the site instan…
