Three hours. That’s how long I stared at my screen, questioning my career choices, doubting everything I knew about programming. And you know what the problem was? A single character. A missing letter. A typo.
The Scene
It was a Friday afternoon. Simple task — fetch some data from an API, process it, save to database. Nothing fancy. I’ve done this a hundred times.
The code looked clean. Logics was solid. I ran it. Nothing happened. No error, no data, just silence.
The Spiral
First hour: I checked the API response. It was returning data correctly. OK, so the problem is in my code.
Second hour: I added console.log everywhere. Tracing every variable. Everything looked fine up until the save function.
Third hour: I started questioning the database connection. Restarted the server. Checked environment variables. Called my colleague to look at it. He couldn’t find anything either.
The Discovery
Then I saw it. There it was. Right in front of me the whole time.
Instead of
userId, I typeduserIDin one place.
The database field was userId (camelCase). My code was sending userID. No error because JavaScript doesn’t care. It just ignored the mismatch silently.
The Lesson
Here’s what I learned that day:
- Silent failures are the worst. No crash, no warning, just nothing. Wish the code had thrown an error instead.
- TypeScript would have caught this. Actually, it probably would have. I was in a hurry and skipped the types. Never again.
- Take a break. I was stuck for 3 hours, but after a 10-minute walk, I spotted it in 30 seconds.
What I’d Do Different
Now I follow these rules:
- Always use TypeScript for anything beyond a simple script
- Add validation early — check that keys exist before processing
- Walk away when stuck. Coffee, walk, anything. The brain needs reset.
So yeah. Three hours for a typo. It happens. We’re all human.