OptionalfetchCustom fetch implementation.
Defaults to globalThis.fetch.
Optionalinit: RequestInitOptionalinit: RequestInitOptionalstrictWhen true, invalid headers cause a KinetexError instead of being
silently dropped. Recommended for strict/production environments where
silent data loss is unacceptable.
Default: false (drop & warn).
OptionalonCalled whenever a header is dropped due to an invalid name or value. Useful for logging or monitoring header sanitization in non-strict mode.
The header name that was dropped.
The header value that was dropped.
Options for the universal fetch-based transport.