Getting into it

HTTP errors in Angular hit fast. One second the app is fine, next second the API throws a 401 or a 500 and the user just sees nothing or some weird message. I don’t want that. I want one place where errors get caught, logged, turned into something readable, and maybe even retried when it makes sense.

That’s why an error-handling interceptor matters. It sits between the app and every request. So instead of fixing error stuff in ten different services, we can handle it once and keep it consistent. I’m thinking about the real mess too. Offline mode, timeouts, expired tokens, backend sending random formats. If we don’t plan for that, we end up with hacks everywhere.

Where this is going

We’ll set up an interceptor that catches HttpErrorResponse, pulls out what matters, and decides what to do next. Sometimes we show a simple message. Sometimes we redirect to login. Sometimes we quietly report it so we can debug later without bothering users every time.

I also want it to be safe. Like not leaking private server messages into the UI, and not spamming alerts on five parallel requests failing at once.

Quick wrap

If you get this interceptor right, your app feels calmer even when the network is chaos. Errors still happen but they stop being random surprises.