v0.8.13 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~=0.8.13a'

Schedule

2025-09-25 11:00 PT: 0.8.13a1 pre-release published for testing
2025-09-29: Planned Public release of 0.8.13

Release Notes

Rework ColorVar to support its subfields

class State(rx.State):
    theme: rx.Color = rx.color("red", 2)

# All of those are valid:
State.theme
State.theme.color
State.theme.shade
State.theme.alpha

• rework transformers and serialize subfields of color vars by @adhami3310 in rework transformers and serialize subfields of color vars #5819

Upgrade react-player (rx.video) to v3

There are some providers that got removed in the update and the API changed. We added a mapping to maintain them as close as possible. If you get any deprecation warnings related to rx.video that's why.

• Upgrade to react-player v3.3.3 by @masenf in Upgrade to react-player v3.3.3 #5818

Automatically convert time and date from str if event handler function is typed as such

If you have an event handler:

import datetime
class State(rx.State):
    @event
    def receive_datetime(self, t: datetime.datetime):
        ...

Then you can do:

State.receive_datetime(datetime.datetime.now())

That used to fail, since we go to the frontend and back, which would serialize the datetime into a string to be stored in JSON. Now we attempt to convert the str into the typed parameter if possible for datetime objects.

• add deser for date and time by @adhami3310 in add deser for date and time #5822

Add option to disable server-side rendering for reflex export and reflex deploy

You can pass --no-ssr to the commands to disable react router per-rendering routes. Note that might hurt your SEO performance. You can also configure that with REFLEX_SSR=1/0.

• add an option to disable ssr for export and deploy by @adhami3310 in add an option to disable ssr for export and deploy #5821

Bugfixes

• bring back manual exception printing by @adhami3310 in bring back manual exception printing #5823

Chores

• 0813dev by @adhami3310 in 0813dev #5816
• Refactor test_evnt_actions_throttle_debounce to be more forgiving by @masenf in Refactor test_evnt_actions_throttle_debounce to be more forgiving #5824

Full Changelog: v0.8.12...release/reflex-0.8.13