How do you handle errors in asynchronous code?

When I use await, I wrap the operation in try/catch where I can sensibly decide what to do after an error. Not every error should be hidden. Sometimes you need to show the user a message, sometimes retry, and sometimes pass the error up.

It's important that the function actually waits for the operation. try { fetch(url); } won't catch a later rejection the way try { await fetch(url); } will. Also remember that fetch usually doesn't reject its Promise just because the server answered 404 or 500 — I check response.ok or the response status.