Plotly extension missing for jupyter lab

I noticed plotly doesn't work in our jupyterlab. Apparently, one needs to install a labextension for that.

In the internet I found two ways of doing it:

• conda install -c conda-forge jupyterlab-plotly-extension
• jupyter labextension install @jupyterlab/plotly-extension In that case, on my laptop I also had to do conda install nodejs.

Any ideas what's the better way?