Network errors

You can respond to the intercepted request with Response.error() that’s designed to represent a network error. The Response.error() static method returns a special kind of Response instance that doesn’t get treated as a normal server response. Instead, it results in a network error, aborting the pending request.

http.get('/resource', () => {
  return HttpResponse.error()
})

Use the Response.error() method to simulate network errors, such as:

• DNS errors;
• Connection timeouts;
• Client going offline.

The WHATWG Fetch API Specification provides no way to customize the network error message so your client will receive a generic TypeError: Failed to fetch error that you should handle in the .catch() closure of your request.