Dash

Fixed

- [2344](https://github.com/plotly/dash/pull/2344) Fix [#1519](https://github.com/plotly/dash/issues/1519), a case where dependent callbacks can be called too many times and with inconsistent inputs
- [2332](https://github.com/plotly/dash/pull/2332) Add key to wrapped children props in list.
- [2336](https://github.com/plotly/dash/pull/2336) Fix inserted dynamic ids in component as props.

Updated

- [2361](https://github.com/plotly/dash/pull/2361) Dependencies upgrade.
- Update Plotly.js to v2.16.4 (from v2.16.1): fix several bugs, particularly related to updating mapbox graphs.

- Add text data for `histogram` traces.
- Fix an interaction between `uirevision` and `autorange` that pops up in some cases of mixed clientside / serverside figure generation.

Fixed

- [2237](https://github.com/plotly/dash/pull/2237) Ensure calls to `plotly.js` from `dcc.Graph` are properly sequenced even if React initiates multiple render cycles in quick succession.
- [2218](https://github.com/plotly/dash/pull/2218) Fix bug [#1348](https://github.com/plotly/dash/issues/1348) Validate children prop (required or not).
- [2223](https://github.com/plotly/dash/pull/2223) Exclude hidden folders when building `dash.page_registry`.
- [2182](https://github.com/plotly/dash/pull/2182) Fix [#2172](https://github.com/plotly/dash/issues/2172) Make it so that when using pages, if `suppress_callback_exceptions=True` the `validation_layout` is not set.
- [2152](https://github.com/plotly/dash/pull/2152) Fix bug [#2128](https://github.com/plotly/dash/issues/2128) preventing rendering of multiple components inside a dictionary.
- [2187](https://github.com/plotly/dash/pull/2187) Fix confusing error message when trying to use pytest fixtures but `dash[testing]` is not installed.
- [2202](https://github.com/plotly/dash/pull/2202) Fix bug [#2185](https://github.com/plotly/dash/issues/2185) when you copy text with multiple quotes into a table
- [2226](https://github.com/plotly/dash/pull/2226) Fix [#2219](https://github.com/plotly/dash/issues/2219) pages register & background callbacks.

Fixed

- [2175](https://github.com/plotly/dash/pull/2175) Fix [#2173](https://github.com/plotly/dash/issues/2173) callback output of ndarray and no_update check.
- [2146](https://github.com/plotly/dash/pull/2146) Remove leftover debug console.log statement.
- [2168](https://github.com/plotly/dash/pull/2168) Reverts [#2126](https://github.com/plotly/dash/pull/2126) (supporting redirect from root when using pages) until the new bugs introduced by that PR are fixed.

Updated

- [2167](https://github.com/plotly/dash/pull/2167) Update Plotly.js to v2.13.3 (from v2.13.1) including [patch release v2.13.2](https://github.com/plotly/plotly.js/releases/tag/v2.13.2) and [patch release v2.13.3](https://github.com/plotly/plotly.js/releases/tag/v2.13.3).
- Emit `plotly_selected` event on plot API calls and GUI edits.
- Fix `sankey` select error (regression introduced in 2.13.0).
- Handle missing drag layer of invisible `sankey` traces to fix select error.
- Emit selection event in shape drawing `dragmode`s when an existing selection is modified.

- Add `smith` subplots and `scattersmith` traces, for drawing Smith charts.

Fixed

- [2087](https://github.com/plotly/dash/pull/2087) Fix bug [#2086](https://github.com/plotly/dash/issues/2086) in which using id as a key within a component's id breaks the new callback context's `args_grouping` function.
- [2084](https://github.com/plotly/dash/pull/2084) In dash 2.5.0, a default viewport meta tag was added as recommended for mobile-optimized sites by [mdn](https://developer.mozilla.org/en-US/docs/Web/HTML/Viewport_meta_tag)
This feature can be disabled by providing an empty viewport meta tag. e.g. `app = Dash(meta_tags=[{"name": "viewport"}])`
- [2090](https://github.com/plotly/dash/pull/2090), [#2092](https://github.com/plotly/dash/pull/2092). Fixed bug where the `path` to the `pages_folder` was incorrect on Windows.

Removed

- [2087](https://github.com/plotly/dash/pull/2087) Removed the undocumented callback context `args_grouping_values` property which was incompatible with pattern-matching callbacks.