Dash

[2.19.1](https://github.com/plotly/plotly.js/releases/tag/v2.19.1) fix various bugs.

Added

- [2881](https://github.com/plotly/dash/pull/2881) Add outputs_list to window.dash_clientside.callback_context. Fixes [#2877](https://github.com/plotly/dash/issues/2877).
- [2903](https://github.com/plotly/dash/pull/2903) Add callback on_error handler, either globally on Dash init or per callback basis. Receives the exception as first argument, can return output(s) or None for `no_update`. Access to original callback context is preserved and `set_props` works inside the error handler.
- [2936](https://github.com/plotly/dash/pull/2936) Adds support for TypeScript 5.5+.
- [2789](https://github.com/plotly/dash/pull/2789) Add library loading capacity to `_allow_dynamic_callbacks`

Fixed

- [2898](https://github.com/plotly/dash/pull/2898) Fix error thrown when using non-existent components in callback running keyword. Fixes [#2897](https://github.com/plotly/dash/issues/2897).
- [2892](https://github.com/plotly/dash/pull/2860) Fix ensures dcc.Dropdown menu maxHeight option works with Datatable. Fixes [#2529](https://github.com/plotly/dash/issues/2529) [#2225](https://github.com/plotly/dash/issues/2225)
- [2896](https://github.com/plotly/dash/pull/2896) The tabIndex parameter of Div can accept number or string type. Fixes [#2891](https://github.com/plotly/dash/issues/2891)
- [2900](https://github.com/plotly/dash/pull/2900) Allow strings in layout list. Fixes [#2890](https://github.com/plotly/dash/issues/2890)
- [2908](https://github.com/plotly/dash/pull/2908) Fix when environment variables are ignored by Dash.run() at runtime. Fixes [#2902](https://github.com/plotly/dash/issues/2902)
- [2888](https://github.com/plotly/dash/pull/2888) Add id to dcc.Loading DOM. Fixes [#2878](https://github.com/plotly/dash/issues/2878)
- [2922](https://github.com/plotly/dash/pull/2922) Fix background callback hash_function when source is unavailable. Fixes [#1885](https://github.com/plotly/dash/issues/1885)
- [2915](https://github.com/plotly/dash/pull/2915) Fix 'AttributeError' when layout is a function that returns a list of components. Fixes [#2905](https://github.com/plotly/dash/issues/2905)
- [2956](https://github.com/plotly/dash/pull/2956) Add missing useEffect dependency to dcc.Loading component.
- [2909](https://github.com/plotly/dash/pull/2909) Rehighlights dcc.Markdown when it is updated, fixes [#2895](https://github.com/plotly/dash/issues/2895)

Fixed

- [2860](https://github.com/plotly/dash/pull/2860) Fix dcc.Loading to apply overlay_style only to the children and not the spinner. Fixes [#2858](https://github.com/plotly/dash/issues/2858)
- [2854](https://github.com/plotly/dash/pull/2854) Fix dcc.Dropdown resetting empty values to null and triggering callbacks. Fixes [#2850](https://github.com/plotly/dash/issues/2850)
- [2859](https://github.com/plotly/dash/pull/2859) Fix base patch operators. fixes [#2855](https://github.com/plotly/dash/issues/2855)
- [2856](https://github.com/plotly/dash/pull/2856) Fix multiple consecutive calls with same id to set_props only keeping the last props. Fixes [#2852](https://github.com/plotly/dash/issues/2852)
- [2867](https://github.com/plotly/dash/pull/2867) Fix clientside no output callback. Fixes [#2866](https://github.com/plotly/dash/issues/2866)
- [2876](https://github.com/plotly/dash/pull/2876) Fix pattern matching in callback running argument. Fixes [#2863](https://github.com/plotly/dash/issues/2863)

Added

- [2832](https://github.com/plotly/dash/pull/2832) Add dash startup route setup on Dash init.
- [2819](https://github.com/plotly/dash/pull/2819) Add dash subcomponents receive additional parameters passed by the parent component. Fixes [#2814](https://github.com/plotly/dash/issues/2814).
- [2826](https://github.com/plotly/dash/pull/2826) When using Pages, allows for `app.title` and (new) `app.description` to be used as defaults for the page title and description. Fixes [#2811](https://github.com/plotly/dash/issues/2811).
- [2795](https://github.com/plotly/dash/pull/2795) Allow list of components to be passed as layout.
- [2760](https://github.com/plotly/dash/pull/2760) New additions to dcc.Loading resolving multiple issues:
- `delay_show` and `delay_hide` props to prevent flickering during brief loading periods (similar to Dash Bootstrap Components dbc.Spinner)
- `overlay_style` for styling the loading overlay, such as setting visibility and opacity for children
- `target_components` specifies components/props triggering the loading spinner
- `custom_spinner` enables using a custom component for loading messages instead of built-in spinners
- `display` overrides the loading status with options for "show," "hide," or "auto"

- [2822](https://github.com/plotly/dash/pull/2822) Support no output callbacks. Fixes [#1549](https://github.com/plotly/dash/issues/1549)
- [2822](https://github.com/plotly/dash/pull/2822) Add global set_props. Fixes [#2803](https://github.com/plotly/dash/issues/2803)

Fixed

- [2362](https://github.com/plotly/dash/pull/2362) Global namespace not polluted any more when loading clientside callbacks.
- [2833](https://github.com/plotly/dash/pull/2833) Allow data url in link props. Fixes [#2764](https://github.com/plotly/dash/issues/2764)
- [2822](https://github.com/plotly/dash/pull/2822) Fix side update (running/progress/cancel) dict ids. Fixes [#2111](https://github.com/plotly/dash/issues/2111)
- [2817](https://github.com/plotly/dash/pull/2817) Change hashing algorithm from md5 to sha256, Fixes [#2697](https://github.com/plotly/dash/issues/2697).
- [2816](https://github.com/plotly/dash/pull/2816) Fix dcc.Dropdown value not updated when option is removed. Fixes [#2733](https://github.com/plotly/dash/issues/2733).
- [2823](https://github.com/plotly/dash/pull/2823) Fix None in "wait" methods causing incorrectly passing tests. Fixes [#2818](https://github.com/plotly/dash/issues/2818)