MIT licensed and maintained by Felipe Lessa
This version can be pinned in stack with:yesod-eventsource-,1081

Module documentation for


It’s easy to send an event from an HTTP client to a server: just send an HTTP request. However, sending events from the server to the client requires more sophisticated approaches. Server-sent events are a standardized way of pushing events from the server to the client.

This package allows your Yesod application to easily send server-sent events. On the client side, you may use the EventSource JavaScript object on browsers that support it ( or a polyfill for browsers that don’t (we support Remy’s polyfill out-of-the-box, although that requires you to explicitly support it).


  • Update documentation from HandlerT to HandlerFor #1703


  • Upgrade to yesod-core 1.6.0


  • Fix warnings