Dash

- Every trace type can now be rendered in a stricter CSP environment, specifically avoiding `unsafe-eval`. Please note: the `regl`-based traces (`scattergl`, `scatterpolargl`, `parcoords`, and `splom`) are only strict in the `strict` bundle, which is NOT served by default in Dash. To use this bundle with Dash, you must either download it and put it in your `assets/` folder, or include it as an `external_script` from the CDN: https://cdn.plot.ly/plotly-strict-2.11.0.min.js. All other trace types are strict in the normal bundle.
- Patch release [2.10.1](https://github.com/plotly/plotly.js/releases/tag/v2.10.1) containing a bugfix for `mesh3d` traces.


Fixed
- [1915](https://github.com/plotly/dash/pull/1915) Fix bug [#1474](https://github.com/plotly/dash/issues/1474) when both dcc.Graph and go.Figure have animation, and when the second animation in Figure is executed, the Frames from the first animation are played instead of the second one.

- [1953](https://github.com/plotly/dash/pull/1953) Fix bug [#1783](https://github.com/plotly/dash/issues/1783) in which a failed hot reloader blocks the UI with alerts.

- [1942](https://github.com/plotly/dash/pull/1942) Fix bug [#1663](https://github.com/plotly/dash/issues/1663) preventing pie traces from sending `customdata` with `clickData` and other events.

Changed

- Set Flask and Werkzeug version upper bound to `<2.3`.

Fixed

- [2545](https://github.com/plotly/dash/pull/2545) Fix typescript objectOf generation.
- [2548](https://github.com/plotly/dash/pull/2548) Fix component as props callback triggering other callbacks not in response, fix [#2487](https://github.com/plotly/dash/issues/2487).

- Support for MathJax v3
- `fillpattern` for `scatter` traces with filled area

Fixed

- [2489](https://github.com/plotly/dash/pull/2489) Fix location change event handling when `Location` objects are removed from the layout. Event handlers would not be removed and eventually change props of a random DOM element, fix [#1346](https://github.com/plotly/dash/issues/1346)
- [2498](https://github.com/plotly/dash/pull/2498) Fix error when caching callbacks which return `Patch` objects by making `Patch` objects picklable
- [2491](https://github.com/plotly/dash/pull/2491) Fix clientside inline function name not found, fix [#2488](https://github.com/plotly/dash/issues/2488)

Fixed

- [2479](https://github.com/plotly/dash/pull/2479) Fix `KeyError` "Callback function not found for output [...], , perhaps you forgot to prepend the ''?" issue when using duplicate callbacks targeting the same output. This issue would occur when the app is restarted or when running with multiple `gunicorn` workers.
- [2471](https://github.com/plotly/dash/pull/2471) Fix `allow_duplicate` output with clientside callback, fix [#2467](https://github.com/plotly/dash/issues/2467)
- [2473](https://github.com/plotly/dash/pull/2473) Fix background callbacks with different outputs but same function, fix [#2221](https://github.com/plotly/dash/issues/2221)