The fetch() method only throws an error if the call does not resolve. A response that returns a status code of 400 or 500 would still be considered a “success”. We can also check in our then() methods to make sure the response.

Does fetch ever throw error?

Per MDN, the fetch() API only rejects a promise when a “network error is encountered, although this usually means permissions issues or similar.” Basically fetch() will only reject a promise if the user is offline, or some unlikely networking error occurs, such a DNS lookup failure.

How can I get error in fetch call?

fetch(url). then((response) => { // Always gets a response, unless there is network error // It never throws an error for 4xx or 5xx response ? }). catch((error) => { // Only network error comes here }); It always gets a response, unless there is a network error.