Copy Fail: I Reproduced the Most Viral HN Bug in My Own Code and Found Something Worse

Copy Fail hit #1 on Hacker News with 977 points. I reproduced it in my Next.js stack and found something the viral post never mentions: when the clipboard fails silently during a password or token copy, the user has no idea. That's not a UX bug. It's a human error vector with real consequences.