Server-sent events support for Yesod apps.

Version on this page:
LTS Haskell 10.5:1.4.1
Stackage Nightly 2018-02-20:1.4.1
Latest on Hackage:1.6.0

See all snapshots yesod-eventsource appears in

MIT licensed and maintained by Felipe Lessa

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).



  • Upgrade to yesod-core 1.6.0


  • Fix warnings
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