Extracts a transport-level error code (e.g. ECONNREFUSED) from an error thrown by the HTTP client.
Only the code string is returned; the original error (which may hold request config, headers
and signed URLs) is never retained. Values that do not look like an error code are ignored.
Parameters
error: unknown
The error object to inspect.
Returns undefined|string
The transport error code, or undefined if none is available.
Extracts a transport-level error code (e.g.
ECONNREFUSED) from an error thrown by the HTTP client.Only the code string is returned; the original error (which may hold request config, headers and signed URLs) is never retained. Values that do not look like an error code are ignored.