Changelog

Async DB support and improved DB connection pooling

• Var operations support datetime values

• Respect CORS for backend HTTP requests

• Serialization performance improvements

• Fix upload cancellation and props from state

Support Pydantic BaseModel (v1 & v2) objects in state

• reflex init now links to templates on the web

• New .temporal event action drops event when backend is down

• Improved type checking

• rx.asset promoted from experimental

New Hosting Service CLI

• Additional static and runtime typing improvements

• rx.get_state API for accessing state outside of event handlers

• Support custom bunfig.toml

• Direct encoding of State vars to JSON (without get_value)

Make Var System Expandable

• Set default gunicorn max_requests to avoid memory leak

• Support for dotenv env_file when python-dotenv is installed

• New rx.dynamic decorator for component functions using state

• More event typing improvements

• Experimental support for Shiki code block

Improved Static Typing for Var and Event

• Support aria_ and data_ props passed to all components

• Optimize state manager and state serialization

• Graphing doc improvements

• Bug fixes

Improve Event Processing Time

• rx.cond can now be used with event triggers, like on_click

• Replace dill with standard pickle for faster serialization

• All rx.el.svg elements are now supported

• Fix styling in dynamic components

• Fix bug when using rx.call_script with f-strings and vars

Experimental Dynamic Components

• Fix various regressions from v0.5.10

• Optionally run app using Granian instead of Uvicorn

• Set REFLEX_USE_SYSTEM_BUN=1 and REFLEX_USE_SYSTEM_NODE=1 to use already-installed runtimes on the PATH

• Bump nextjs to 14.2.13

Improved Javascript Interop with updated rx.Var API

• Maintain state across hot reloads

• Added backend /_health endpoint to get server status

• Better validation of dynamic route args, computed vars, and dependency tracking.

• Drop support for Python 3.8

Bug Fixes

• Move chakra components into its repo (reflex-chakra)

• Fix import clash between connectionToaster and hooks.useState

• Fix various line_chart issues

• Validate Toast Props

• Use different registry when in china

Bug Fixes

• Properly set is_hydrated to false on page navigation events

• @rx.var(cache=True) now correctly gets the initial value

• Accessing /404 now shows the 404 page content

• Fix event actions for Recharts event triggers

• Allow setting rx.breakpoints in the style prop

Use templates from reflex-dev/templates

• Nicer looking default style for charts and graphs

• Support rx.svg circle, polygon and rect components

• Bug fixes for background tasks, class_name prop, fully controlled inputs and more

• Progress on Var Operations refactor

Specify frontend and backend exception handlers

• Recharts improvements

• Fix for 404 error on dynamic route after hot reload

• Fix deprecation warnings

• Support mutation tracking for SQLAlchemy models

Fix hot-reload issues on Windows

• rx.clipboard component for handling on_paste event

• rx.breakpoints API for passing responsive CSS props

• Fix ComponentState with backend vars issue

• Fix sqlmodel metaclass conflict issue

Support rx.SessionStorage as State Var

• More Recharts improvements

• Better support for interactive stateless apps

• Fix websocket disconnect when navigating to another domain

• Make .web folder location configurable with REFLEX_WEB_WORKDIR

Better support for serializing datetime, Color, Path, and others to string

• Default theme appearance to system light/dark setting

• Toast component is now promoted to rx.toast

• Recharts props accept rx.color values

• Avoid hang when backend disconnects while processing an event

Plotly Improvements

• More granular lazy imports

• External asset support

• Numerous bug fixes (see release notes)

Support for Lifespan tasks

• Vertical tabs

• Configurable gunicorn workers in prod mode

• Fix for setting global font_family style

Connection Error is now a Toast

• rx.toast supports action buttons and on_dismiss/on_auto_close

• Improved typing for ConnectionState and State mixins

• Faster CLI launch time

• Better customizability for rx.accordion

Radix Themes 3.0

• New public API methods for wrapping 3rd-Party Components

• Generic throttle and debounce for all event handlers

• Use Alembic batch mode for db makemigrations

• Experimental toast component in rx._x.toast

Bug Fixes and Various Improvements

• Fix for UnicodeDecodeError on Windows

• Use npm fallback when bun does not work

• Allow set in Var.contains

• Fix for light/dark dialogs not matching current theme appearance

Support Bun on Windows for Faster Dependency Installation

• Expose transpile_packages for Components that do not identify as ES6 module

• Enum types are serialized to their values

• Automatic tuple unpacking for Component children

New reflex init templates

• Use any Reflex app on Github as an initial template

• reflex run will automatically init the app when required

• Reflex Experimental Namespace: rx._x

• Windows support for Python 3.12

rx.ComponentState provides simple per-component state

• Use dill instead of cloudpickle

• More compatible package pins

• rx.EventHandler annotation

• Automatic pyi generation for published components

Support SQLAlchemy Models Directly

• Experimental Multi-process Compilation

• Better default titles for SEO

• router.session.client_ip more likely to be correct now

• Allow rx.download to resolve rx.get_upload_url links

Fix missing on_load and /_upload in prod deployments

• rx.upload exposes on_drop event trigger

• rx.el.form supports on_submit event trigger

• Improve 'Stateless' app detection

• Expose lang and other attributes on tag

CLI for Creating and Publishing 3rd Party Components

• get_state() API for accessing arbitrary states

• Set initial_value for computed vars

• Less invasive backend disconnected notification

Syncronize local storage between tabs

• Tuple type annotations are now respected index-wise

• Substates are serialized individually

• Better Image Serialization

Fix Windows Hot-reload Issues

• Fix browser error when triggering upload with no files selected

• Fix regression: rx.link with is_external

Replace Chakra with Radix components

• Entirely new core component library based on radix-ui

• App-wide theming system

• Enhanced support for upload and download

Lucide Icons now available at rx.lucide.icon

• Custom Reflex support directory (REFLEX_DIR)

• Better support for native SQLAlchemy models

• Avoid exposing unused _upload and _event endpoints

Improve hot-reload times in dev mode

• Allow State subclasses to use mixins to define fields

• Improvements to Radix-UI preview components

New rx.match helper acts as a switch statement

• app.compile() is no longer required

• Add time_picker component

• Support bare SQLAlchemy DeclarativeBase models

Support SQLAlchemy v2

• Preview of radix themes components

• Allow redis:// and rediss:// style URL

rx.el components working with State

Performance Improvements

• More flexible rx.State subclassing

• Enhanced standard HTML elements under rx.el

Support Dynamic Forms

• Support python 3.12

• NextJS 14

• Fast lazy import

• Upload with progress and cancellation

Work with Github Codespaces

• Expose gunicorn_worker_class for extended configuration

• stop_propagation and prevent_default for all events

New rx.data_editor Component

• Reflex hosting alpha CLI

• Drop python 3.7 support

• Experimental support for Radix themes

Core Graphing Improvements

• Core Graphing Library is now Recharts

• HTML Editor Component

• Run Arbitrary Javascript from Event Handler

• Redirect into New Window

• rx.constants Module Refactored

Background Tasks + Improved API for wrapping components.

• Support long-running non-blocking operations

• Trigger file downloads

• Better change tracking for state vars

• Arbitrary args for event triggers and serializers for custom types

Reduced Package Size + Client-side Storage.

• Reduced initial package size by 60%

• Client-side Storage integrated with State

• Added on_mount and on_unmount triggers for all components

• Per-component prop autocompletion for IDEs and breakpoints support

Bug fix to connect to no sql databases.

• Added the step prop to Slider.

• Added support for limits in pagination

Performance improvements + bug fixes.

• Removing the Node dependency on Windows

• 3x performance improvement on the frontend (dev mode should be much snappier now!)

• f-string support for vars