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A minor release in 7.6.x series.



To see the full list of pull requests and issues, see the 7.6.0 milestone on GitHub.

The main change in this release is that installing ipywidgets 7.6.0 will now automatically enable ipywidgets support in JupyterLab 3.0—a user has no extra JupyterLab installation step and no rebuild of JupyterLab, nor do they need Node.js installed. Simply install the python ipywidgets package with pip (pip install ipywidgets==7.6.0) or conda/mamba (conda install -c conda-forge ipywidgets=7.6.0) and ipywidgets will automatically work in classic Jupyter Notebook and in JupyterLab 3.0.

This is accomplished with the new python package jupyterlab_widgets version 1.0, on which ipywidgets 7.6.0 now depends (similar to how ipywidgets already depends on the widgetsnbextension package to configure ipywidgets for the classic Jupyter Notebook). The jupyterlab_widgets Python package is a JupyterLab 3.0 prebuilt extension, meaning that it can be installed into JupyterLab 3.0 without rebuilding JupyterLab and without needing Node.js installed.

Updates for Widget Maintainers

Custom widget maintainers will need to make two changes to update for JupyterLab 3:

  1. Update the @jupyter-widgets/base dependency version to include ^4 to work in JupyterLab 3.0. For example, if you had a dependency on @jupyter-widgets/base version ^2 || ^3, update to ^2 || ^3 || ^4 for your widget to work in classic Jupyter Notebook, JupyterLab 1, JupyterLab 2, and JupyterLab 3. See #2472 for background.

  2. In the package.json, add the following sharedPackages configuration inside the jupyterlab key. See the JupyterLab extension documentation for more information.

      "jupyterlab": {
        "sharedPackages": {
          "@jupyter-widgets/base": {
            "bundled": false,
            "singleton": true

Separate from these two steps to update for JupyterLab 3, we also recommend that you make your widget's JupyterLab extension a prebuilt extension for JupyterLab 3.0. Users will be able to install your JupyterLab 3.0 prebuilt extension without rebuilding JupyterLab or needing Node.js. See the JupyterLab 3 extension developer documentation or the new widget extension cookiecutter for more details.