Stateless CSRF Protection for Express (Double Submit Cookie)

csrf-csrf is a utility package designed to provide stateless Cross-Site Request Forgery (CSRF) protection for Express applications, implementing the Double Submit Cookie Pattern. Currently at version 4.0.3, it offers a robust alternative to the deprecated `csurf` library, aiming for a simpler and more explicit configuration. Unlike session-based CSRF protection mechanisms like `csrf-sync` (which uses the Synchronizer Token Pattern), `csrf-csrf` is suited for stateless architectures, making it a distinct choice for specific application designs. The library ships with comprehensive TypeScript types (requiring TypeScript >= 3.8) and emphasizes clear implementation guidance to prevent common misconfigurations that can render CSRF protection ineffective. Development is active, with a recent major version release bringing breaking changes and improvements, and it explicitly recommends consulting upgrade guides for migration.