Version Details and Security Vulnerabilities

The npm package on-headers version 0.0.0 marks a very early stage in the library's development. Released in May 2014, it provides a mechanism to execute a listener function right before a response's headers are written, enabling developers to modify or inspect headers at a critical juncture in the request/response lifecycle. This initial release, as indicated by its version number, should be approached with caution in production environments.

Compared to its predecessor which we don't have available information about, a developer should consider the stability and the number of features as the main changing points.

The listed dependencies and development dependencies hint at the developer considerations at the time. No dependencies means a lean footpring, while mocha and supertest where used for test purposes. Licensed under the MIT license, it invites open usage and modification. Hosted on GitHub under the expressjs organization, it signals a connection to the broader Express.js ecosystem. This early version offers a basic, but functional, solution for manipulating headers and provides a foundation for future improvements.

For developers considering on-headers, understanding the evolution from this initial version is key, particularly paying attention to any breaking changes, bug fixes, and expanded feature sets introduced in subsequent releases.