Collapsible attributes in _repr_html_

[smithara]

Is your feature request related to a problem? Please describe.

I have a situation where I write a long list to the .attrs, which results in too long an output:
....

Describe the solution you'd like

Can the attribute output be changed to be displayed in the same way as the other variables? (collapsed to one line)

Describe alternatives you've considered

Perhaps I am misusing the attributes and this kind of data should instead be a data variable? (though I would not like that since this information is intended as metadata)

[stale]

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