yahoo/express-state

Express State is a Node.js library that allows developers to share configuration and state data from an Express server with client-side JavaScript. It provides methods to expose data at both app and request scopes, supports smart namespacing, and offers efficient serialization of complex data types including functions and regular expressions. The library is designed for developers building progressively enhanced web applications who need to pass server-side state to client-side code, such as user information, CSRF tokens, or API keys.