v0.7.8 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~=0.7.8a'

Schedule

2025-04-17 12:36 PST: 0.7.8a1 pre-release published for testing
2025-04-21: Planned Public release of 0.7.8

Release Notes

is_none() and is_not_none() operations.

If you were getting some of those pesky lint errors because you were doing some_var == None, you can do some_var.is_none() instead.

• add is none by @adhami3310 in add is none #5136

Call event handlers with keyword arguments

Although pyright will be mad at you.

import reflex as rx


class State(rx.State):
    """The app state."""

    field: int = 0

    @rx.event
    def change_field(self, new_value: int):
        """Change the state field."""
        self.field = new_value


def index() -> rx.Component:
    return rx.button(
        "Click me!",
        State.field,
        on_click=State.change_field(new_value=2),
    )


app = rx.App()
app.add_page(index)

• Allow calling event handlers with keyword arguments by @adhami3310 in Allow calling event handlers with keyword arguments #5124

NextJS upgrade (15.3.0)

This includes faster builds if you enable the environment variable REFLEX_USE_TURBOPACK.

• nextjs 15.3 by @adhami3310 in nextjs 15.3 #5125

Bugfixes

• i hate order of precedence by @adhami3310 in i hate order of precedence #5134
• Read environment secrets in state at import time [ENG-5426] [ENG-5455] by @adhami3310 in Read environment secrets in state at import time [ENG-5426] [ENG-5455] #5120
• make event statically type-able by @adhami3310 in make event statically type-able #5135
• add str to callback for call_function by @adhami3310 in add str to callback for call_function #5139

Chores

• bump to 0.7.8dev by @adhami3310 in bump to 0.7.8dev #5129
• update supported version in security by @adhami3310 in update supported version in security #5128
• enable UP ruff rule by @adhami3310 in enable UP ruff rule #5137

Full Changelog: v0.7.7...release/reflex-0.7.8