During April 2026, this developer contributed to the axios/axios repository by introducing the ECONNREFUSED constant within AxiosError, enabling type-safe handling of connection-refused errors. The work focused on enhancing error handling reliability and aligning error-code conventions across the library, which helps reduce debugging time for users facing connection issues. The implementation leveraged TypeScript for robust typings and JavaScript for integration within the codebase, demonstrating attention to maintainability and consistency with existing error codes such as ECONNABORTED and ETIMEDOUT. The feature was delivered through a well-documented, collaborative commit, reflecting a methodical approach to improving Axios’s error handling architecture.