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Changelog for 8.0 #3132

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A summary of changes in ipywidgets. For more detailed information, see the issues and pull requests for the appropriate milestone on [GitHub](https://github.com/jupyter-widgets/ipywidgets).

## [8.0](https://github.com/jupyter-widgets/ipywidgets/releases/tag/v8.0) (not released yet)

See the [ipywidgets
8.0](https://github.com/jupyter-widgets/ipywidgets/milestone/30?closed=1)
milestone on GitHub for the full list of pull requests and issues closed.

### Users

* The default CDN is changed from unpkg to jsDelivr ([#3121](https://github.com/jupyter-widgets/ipywidgets/pull/3121), [#1627](https://github.com/jupyter-widgets/ipywidgets/issues/1627))
* Documentation overhaul ([#3104](https://github.com/jupyter-widgets/ipywidgets/pull/3104), [#3096](https://github.com/jupyter-widgets/ipywidgets/issues/3096), [#3099](https://github.com/jupyter-widgets/ipywidgets/pull/3099), [#3076](https://github.com/jupyter-widgets/ipywidgets/issues/3076), [#2824](https://github.com/jupyter-widgets/ipywidgets/pull/2824))
* Use data-jupyter-widgets-cdn-only attribute to load modules only from cdn ([#2792](https://github.com/jupyter-widgets/ipywidgets/pull/2792), [#2786](https://github.com/jupyter-widgets/ipywidgets/issues/2786))
* Revamp file upload widget `.value` attribute ([#2767](https://github.com/jupyter-widgets/ipywidgets/pull/2767), [#2724](https://github.com/jupyter-widgets/ipywidgets/pull/2724), [#2666](https://github.com/jupyter-widgets/ipywidgets/pull/2666), [#2480](https://github.com/jupyter-widgets/ipywidgets/issues/2480))
* Borders independently: `border_top`, `border_right`, `border_bottom`, `border_left` ([#2757](https://github.com/jupyter-widgets/ipywidgets/pull/2757))
* Make selection container titles a tuple of strings ([#2746](https://github.com/jupyter-widgets/ipywidgets/pull/2746))
* Change media widgets to use memory views. ([#2723](https://github.com/jupyter-widgets/ipywidgets/pull/2723))
* Upgrade to FontAwesome 5 in html-manager ([#2713](https://github.com/jupyter-widgets/ipywidgets/pull/2713))
* Slider implementation now uses [nouislider](https://refreshless.com/nouislider/) instead of jquery-ui ([#2712](https://github.com/jupyter-widgets/ipywidgets/pull/2712), [#630](https://github.com/jupyter-widgets/ipywidgets/issues/630))
* Play widget now toggles between play and pause button as needed ([#2703](https://github.com/jupyter-widgets/ipywidgets/pull/2703), [#2671](https://github.com/jupyter-widgets/ipywidgets/issues/2671))
* Tooltips everywhere ([#2680](https://github.com/jupyter-widgets/ipywidgets/pull/2680))
* Drop support for mapping types as selection options ([#2679](https://github.com/jupyter-widgets/ipywidgets/pull/2679), [#1958](https://github.com/jupyter-widgets/ipywidgets/issues/1958))
* Focus or blur a widget. ([#2664](https://github.com/jupyter-widgets/ipywidgets/pull/2664), [#2692](https://github.com/jupyter-widgets/ipywidgets/pull/2692), [#2691](https://github.com/jupyter-widgets/ipywidgets/pull/2691), [#2690](https://github.com/jupyter-widgets/ipywidgets/pull/2690))
* Tabbable or not tabbable ([#2640](https://github.com/jupyter-widgets/ipywidgets/pull/2640))
* Tagsinput widget ([#2591](https://github.com/jupyter-widgets/ipywidgets/pull/2591))
* Drop notebook dependency from widgetsnbextension ([#2590](https://github.com/jupyter-widgets/ipywidgets/pull/2590))
* Drop support for legacy python 2.7 and eol 3.4 ([#2558](https://github.com/jupyter-widgets/ipywidgets/pull/2558), [#2655](https://github.com/jupyter-widgets/ipywidgets/pull/2655))
* Cast 'value' in range sliders to a tuple ([#2441](https://github.com/jupyter-widgets/ipywidgets/pull/2441))
* Added a layout widget for 'stacked' layout ([#2376](https://github.com/jupyter-widgets/ipywidgets/pull/2376))
* Play widget: expose playing and repeat ([#2283](https://github.com/jupyter-widgets/ipywidgets/pull/2283), [#1897](https://github.com/jupyter-widgets/ipywidgets/issues/1897))
* Fix debouncing and throttling code ([#3060](https://github.com/jupyter-widgets/ipywidgets/pull/3060))
* Fix regression on spinning icons ([#2685](https://github.com/jupyter-widgets/ipywidgets/pull/2685), [#2477](https://github.com/jupyter-widgets/ipywidgets/issues/2477))
* Fix selection container default index ([#1823](https://github.com/jupyter-widgets/ipywidgets/pull/1823))
* Remove deprecated overflow properties ([#2688](https://github.com/jupyter-widgets/ipywidgets/pull/2688))

### Developers

#### Python

* `Widget.widgets` and `Widget.widget_types` are now private variables ([#3122](https://github.com/jupyter-widgets/ipywidgets/pull/3122))
* Generate the widget data spec as JSON ([#2193](https://github.com/jupyter-widgets/ipywidgets/pull/2193))
* Use _repr_mimebundle_ and require ipython 6.1 or later. ([#2021](https://github.com/jupyter-widgets/ipywidgets/pull/2021), [#1811](https://github.com/jupyter-widgets/ipywidgets/issues/1811))

#### Javascript

* Fix CSS variable names to match JupyterLab names ([#2801](https://github.com/jupyter-widgets/ipywidgets/pull/2801), [#2062](https://github.com/jupyter-widgets/ipywidgets/issues/2062))
* Delete display_model and display_view ([#2752](https://github.com/jupyter-widgets/ipywidgets/pull/2752), [#2751](https://github.com/jupyter-widgets/ipywidgets/issues/2751))
* Drop underscore usage ([#2742](https://github.com/jupyter-widgets/ipywidgets/pull/2742))
* Upgrade to es2017 javascript ([#2725](https://github.com/jupyter-widgets/ipywidgets/pull/2725))
* Split base manager into separate packages ([#2710](https://github.com/jupyter-widgets/ipywidgets/pull/2710), [#2561](https://github.com/jupyter-widgets/ipywidgets/issues/2561))
* Change phosphor to lumino ([#2681](https://github.com/jupyter-widgets/ipywidgets/pull/2681))
* Widgetmanagerbase: improve create_view return type ([#2662](https://github.com/jupyter-widgets/ipywidgets/pull/2662))
* Labmanager refactor ([#2532](https://github.com/jupyter-widgets/ipywidgets/pull/2532))
* Make more of lab manager dependencies optional ([#2528](https://github.com/jupyter-widgets/ipywidgets/pull/2528))
* Remove class `jupyter-widgets` from jp-outputarea-output node ([#2500](https://github.com/jupyter-widgets/ipywidgets/pull/2500))
* Removed deprecated signature of the `register` decorator ([#2695](https://github.com/jupyter-widgets/ipywidgets/pull/2695))
* Remove deprecated `handle_kernel` alias ([#2694](https://github.com/jupyter-widgets/ipywidgets/pull/2694))


## 7.6

To see the full list of pull requests and issues, see the [7.6.0 milestone](https://github.com/jupyter-widgets/ipywidgets/milestone/31?closed=1) on GitHub.
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