Zero-dependency, HTTP/1 safe, simple, spec compliant server and client

Spec Compliant

As a reference implementation, the library is fully compliant with the GraphQL over SSE (Server-Sent Events) spec

Single connection mode

Safe for HTTP/1 servers and subscription heavy apps

Distinct connection mode

Each connection is a subscription on its own

Upgrade over regular SSE

Contains improvements for clarity and stability

Server and Client

Single library, but both the server and the client is included


Library contains everything it needs

Still small bundle

Thanks to tree-shaking and module separation

Smart retry strategies

Customize the reconnection process to your desires

Run everywhere

Completely server agnostic, run them both anywhere