v0.8.12 Pre-release thread

[adhami3310]

Please report any problems you encounter in this discussion thread or as separate issues on reflex-dev/reflex.

pip install 'reflex~=0.8.12a'

Schedule

2025-09-18 11:40 PT: 0.8.12a1 pre-release published for testing
2025-09-22: Planned Public release of 0.8.12

Release Notes

Bugfixes

Check against using components as styles accidentally

If you do:

rx.el.div(something=rx.icon(...))

The icon would be interpreted as style value. That used to raise a runtime error, now it happens at compile time.

• ENG-7583: check against base component for style by @adhami3310 in ENG-7583: check against base component for style #5795

console.error now correctly point to stderr

Previously things like backend exceptions and frontend exceptions wouldn't go to stderr. This is now fixed.

• ENG-7619: make console errors go to stderr by @adhami3310 in ENG-7619: make console errors go to stderr #5789

Background event vars would reconnect to frontend after period of disconnectivity

• Reassociate sid and token when connecting websocket by @masenf in Reassociate sid and token when connecting websocket #5794

Doing foreach over a null that is mistakenly typed as a list or an object will not result in a runtime error (would be just an empty list)

• avoid runtime errors on iterating over non-array by @adhami3310 in avoid runtime errors on iterating over non-array #5796

Env vars properly update from REFLEX_ENV_FILE with Granian

• use _load_dotenv_from_env on reload for granian by @adhami3310 in use _load_dotenv_from_env on reload for granian #5798

Chores

• 0812dev by @adhami3310 in 0812dev #5792

Full Changelog: v0.8.11...release/reflex-0.8.12