Slonik Transaction Middleware for Express.js

express-slonik provides an Express.js middleware for managing PostgreSQL transactions using the Slonik client library. It simplifies the integration of database transactions into Express route handlers, ensuring that all database operations within a request either commit successfully or roll back entirely. The current stable version is 3.2.0, released in October 2023. The project maintains a frequent release cadence, primarily to align with new major versions of its peer dependency, Slonik, adding support for recent Slonik versions shortly after their release. Its key differentiator is its zero-dependency approach (beyond Express and Slonik itself) and its focus on robust transaction management within the Express middleware pattern, including support for isolation levels and explicit transaction control across multiple handlers.