tamper - Response Body Middleware

tamper is a Node.js middleware designed for intercepting and modifying HTTP response bodies before they are sent to the client. It provides a simple API for Connect/Express-compatible applications, allowing developers to inspect request and response headers and conditionally apply transformations to the response body. The current stable version, 1.1.0, indicates a mature but largely feature-complete codebase with infrequent updates. Its primary differentiation lies in its focused scope of response body manipulation, offering a callback-based or Promise-based mechanism for transformations. It's particularly useful for tasks like injecting scripts, performing server-side content rewrites, or debugging response payloads without directly altering original handlers. It ships with TypeScript types, enhancing developer experience for type-safe applications.