I found that Plotly is very useful for zooming in/out per HotNipi's suggestions.
Currently, I use the template node and use the following script
to add to the site's section.
However, when there is no internet access, Plotly chart does not work.
So I would like to include Plotly to Node Red when there is not internet access.
What is the best way to do so? I have downloaded "plotly-latest.min.js" file to Node Red server but have not figured where to put it. I put it under the default directory ".node-red" and change the link to the file, it does not work