I'm a bit confused with how errors are handled in Wordpress's REST API. In their examples they suggest to use WP_Error to return errors, but WP_REST_Response has the HTTP status code as a second parameter, which makes it shorter and somewhat cleaner to my taste.
So I'm comparing this way of returning an error:
return new WP_REST_Response(array('error' => 'Error message.'), 400);
With this one:
return new WP_Error('rest_custom_error', 'Error message.', array('status' => 400));
With the first option I can have just the error text in my response and it's enough for me. So the response would look like so:
{"error":"Error message."}
With the second one it's more detailed:
{"code":"rest_custom_error","message":"Error message.","data":{"status":403}}
But I also need to specify the error code (first parameter), which doesn't give any advantage to my front-end implementation. Other than the syntax, I'm curious about differences in performance, security and future-proof factors.
So is there any reason to prefer one over the other other than the personal preferences?
