Added

• #2276 Added component prop static typing for Python.
  • #3152 Custom Python prop typing for component library.
    • Added -t, --custom-typing-module argument to dash-generate-components CLI, default to dash_prop_typing and can contains definitions in variables:
      • custom_imports: dict[ComponentName, list[str]] import statement to be copied at the top of the component class definition.
      • custom_props: dict[ComponentName, dict[PropName, function]] for custom props. The function signature is: def generate_type(type_info, component_name, prop_name) -> str
  • #3035 PropType generation for Typescript components allowing runtime prop validation when in debug mode.
• #3121 Restyle and add version checker to dev tools.
• #3029 Add pip install based hooks to Dash functionalities.
  • Packages can add an entry_points with key dash-hooks to their setup.py for a module to be run when a Dash app is started.
  • Add dash.hooks methods to hook into Dash apps.
    • hooks.layout takes the layout as argument and must return a layout, can be used to wrap or add to the layout of Dash apps.
    • hooks.callback defines a callback to be added to Dash apps.
    • hooks.clientside_callback defines a clientside callback to be added to Dash apps.
    • hooks.setup is called before a Dash app is started to get an instance of the app as first argument.
    • hooks.error to receive all callback errors.
    • hooks.index to change the Dash.index_string.
    • hooks.route to add a Flask route to the Dash app.
    • #3175 hooks.custom_data to add custom data called from the callback route to the user callback.
• #3066 Adds window.dash_component_api for components developer as alternative to removed _dashprivate props.
  • Add dash_component_api.useDashContext, dash_component_api.DashContext to access the redux store and loading mechanisms.
    • DashContext.componentPath hold the path to the current component.
    • DashContext.useLoading(options?) selector to get a boolean if the component is loading.
    • DashContext.isLoading in case you need to use outside of a functional component.
    • DashContext.useSelector to create custom selectors for the connected redux store.
    • DashContext.useStore get the Dash app redux store.
    • DashContext.useDispatch to dispatch new actions on the Dash redux store.
  • Add dash_component_api.getLayout(path) to replace _dashprivate_layout.
  • Expose stringifyId in window.dash_component_api. #3175
  • Add window.dash_component_api.ExternalWrapper to render Dash components that are not part of the layout tree. #3170 #3183

Removed

• #3066 loading_state removed from components props.
• #3078 Deprecations removals
  • Removed dash.development.component_loader, components libraries now required to generate the components with dash-generate-components.
  • Dash.run_server has been removed in favor of Dash.run.
  • Removed dcc.LogoutButton component.
  • Renamed all long references to background.

Changed

• #3093 Changed default React version to 18.3.1
  • defaultProps on functional components now emits a deprecation warning.
  • Deprecation notice on strings refs.

Fixed

• #3080 Fix docstring generation for components using single-line or nonstandard-indent leading comments
• #3103 Fix Graph component becomes unresponsive if an invalid figure is passed
• #3190 Fix issue with cache key generation by adding option to include triggered inputs. Fixes #3189
• #3130 Fix HOST variable when using conda.
• #3066 Improve performance of context components re-rendering.
• #3171 JupyterDash Fix - Alive Check
• #3168 Fix clientside pattern matching with a dot in the id.