4 Tiny Mistakes That Secretly Destroy App Performance, by (not on Mastodon or Bluesky):

https://dev.to/sylwia-lask/4-tiny-mistakes-that-secretly-destroy-app-performance-3cgo?ref=frontenddogma.com

#performance #webapps #mistakes #cors #codesplitting #dependencies #backgrounds #images

Open TCP Connections in the Browser

Puter.js는 브라우저에서 직접 TCP 및 TLS 소켓 연결을 지원하는 자바스크립트 라이브러리로, 별도의 서버나 프록시 없이 네트워크 통신을 구현할 수 있습니다. CORS 제한을 우회하는 HTTP fetch 기능도 제공하여 외부 API 호출 시 백엔드 작업이 필요 없습니다. TLS 암호화를 클라이언트 측에서 처리해 보안성을 유지하며, SSH 클라이언트나 이메일 클라이언트 같은 저수준 네트워크 애플리케이션 개발에 적합합니다. 사용자 부담 모델로 대역폭 비용을 사용자에게 전가해 개발자는 인프라 비용 걱정 없이 앱을 구축할 수 있습니다.

https://developer.puter.com/networking/

#javascript #networking #tcp #tls #cors

Show HN: Corsproxy – Fix CORS Errors Instantly – Free for Development

Corsproxy는 개발자가 CORS(Cross-Origin Resource Sharing) 오류를 즉시 해결할 수 있도록 돕는 무료 프록시 서비스입니다. 별도의 설정 없이 API 요청 URL 앞에 프록시 주소를 붙이기만 하면 CORS 문제를 우회할 수 있으며, 330개 이상의 엣지 로케이션을 통해 낮은 지연 시간과 99.9% 가동 시간을 보장합니다. 개발용은 무료이며, 프로덕션 환경용 유료 플랜도 제공됩니다. 다양한 헤더 조작, 캐싱, 데이터 변환 기능도 지원해 개발 편의성을 높였습니다.

https://corsproxy.io/

#cors #proxy #webdevelopment #api #developertools

I was recently reminded that I wanted to try out Codeberg Pages, so I migrated a static site over from GitHub Pages. It mostly worked, and a learned a little along the way about how Codeberg Pages works.
Read more: https://danq.me/2026/05/04/github-to-codeberg-pages/

#article #codeberg #cors #git #github #web

CORSを一緒に理解しよう（Cross-Origin Resource Sharing）
https://qiita.com/NXD139/items/ec04f8d5c110a9927498?utm_campaign=popular_items&utm_medium=feed&utm_source=popular_items

#qiita #HTTP #Security #CORS #privacy

I just renewed my vehicle registration/insurance. We have a provincial crown corporation here that has a monopoly on it.

I ran into a problem with their "new & improved!" website [1]. I always do. This one is boring; like 90% of the issues I run into, it's because the developers have only tested the site with Chrome, and they're violating CORS policy (a security thing) so Firefox prevents a request trying to fetch part of the page contents. Chrome doesn't give a damn, it doesn't want to stop any trackers or anything.

But the 🧑‍🍳 😘 in the whole thing is ... there are various "Feedback" links and buttons. I want to report the issue, so I try them, and ... they haven't actually provided the HREF attribute on the links/buttons at all. They are literally not hooked up to anything.

Good testing on the new site, boys! You sure you didn't miss testing any of the functionality?

[1] Why companies absolutely insist on regularly improving their websites into unusability escapes me. As I mentioned elsewhere, it's not like the HTML of the working site has a best-before date on it.

#CADT #WebDeveloper #Firefox #CORS #HREF #feedback #NewAndImproved #qwality #WeveHeardOfIt

🎉 After a few years of refinement and close to 1 << 9 commits, I'm pleased to announce the v1 release of my CORS middleware library for Go.

Let me know whether it patches things up between you and CORS!

https://github.com/jub0bs/cors

#golang #CORS

CORSとプリフライトリクエストについて
https://qiita.com/yakumo_09/items/66c8065e7caf1c5e9a16?utm_campaign=popular_items&utm_medium=feed&utm_source=popular_items

#qiita #CORS #備忘録 #preflight_request