ReDoc Express Middleware

redoc-express is a lightweight Express middleware designed to serve interactive API documentation using the ReDoc UI from OpenAPI/Swagger specifications. The current stable version is 2.1.3, last published 6 months ago, indicating active maintenance. It provides a simple, single-middleware setup to integrate professional-grade API documentation into Node.js Express applications without requiring complex build tools. A key differentiator is its first-class TypeScript support with comprehensive type definitions, 100% test coverage, and compatibility with Node.js 6+ (ES5) and Express 4.x/5.x. It supports both OpenAPI 3.0+ and Swagger 2.0 specifications. The package focuses on ease of use, offering sensible defaults and extensive customization options via ReDoc's configuration, including built-in CSP nonce support for enhanced security.