Pre-expand data and attributes in DataArray/Variable HTML repr?

[shoyer]

Proposal

Given that a major purpose for plotting an array is to look at data or attributes, I wonder if we should expand these sections by default?

• I worry that clicking on icons to expand sections may not be easy to discover
• This would also be consistent with the text repr, which shows these sections by default (the Dataset repr is already consistent by default between text and HTML already)

Context

Currently the HTML repr for DataArray/Variable looks like this:

To see array data, you have to click on the icon:

(thanks to @max-sixty for making this a little bit more manageably sized in #3905!)

There's also a really nice repr for nested dask arrays:

[shoyer]

@pydata/xarray any opinions here?

[dcherian]

Looks great to me.

[benbovy]

Looks good to me too. Perhaps it would be nice to add some more display options later, so that users will have more control on that?

[aarondewindt]

Is there a way to configure this? I would prefer the data and attributes to be collapsed in the project I'm currently working on.

[aarondewindt]

I had a look at the source, there isn't. I might look into implementing this if there is enough interest.

[dcherian]

You could help finish up #4230

[aarondewindt]

Thanks, I'll have a look and see what I can do.