connect-flash

connect-flash is a simple middleware for Express and Connect frameworks that enables easy storage and retrieval of one-time flash messages in a user session, which are particularly useful for displaying success or error notifications after redirects in web applications. Once installed and wired into a session-enabled Express app, it lets you set messages that persist across a single request–redirect–response cycle and then automatically clears them so they don’t show up repeatedly. The API is minimal: you call req.flash(type, message) to store a flash and then read them back in views or route handlers when needed, which makes it a practical solution for form submission feedback, login failure notices, and other transient user alerts. By abstracting flash message handling into middleware, connect-flash eliminates the need for manual session management code and enhances UX with consistent request feedback patterns.