React Widget example breaks the running panel

jupyterlab / extension-examples

JupyterLab Extensions by Examples

BSD 3-Clause "New" or "Revised" License

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Closed jtpio closed 4 years ago

jtpio commented 4 years ago

From the 3.0 branch using JupyterLab 3.0.0rc1, opening the React Widget breaks the running panel:

react-running-panel

With the following error:

Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined.

jtpio commented 4 years ago

Found a similar behavior in another third-party extension using the ReactWidget from @jupyterlab/apputils when updating to lab 3.0.