Notebook with embedded vega-lite output doesn't show properly

[davidanthoff]

I'm trying to use the built-in vega-lite support for the julia VegaLite.jl package. Through a lot of hoops I managed to create this notebook file. Don't try to run the code in that notebook, that part only works if you have a whole number of unreleased branches checked out on the julia side of things.

BUT, at the end of the day, I would have expected that if this notebook file just gets opened in jupyterlab with the vega3 extension installed, that it would show the vega-lite plot. The second cell does have a data field that has the mime type application/vnd.vegalite.v2+json, and inside there it does have a valid vega-lite 2 spec, so shouldn't this show the graph if I just open that file in jupyterlab?

I am suspecting that I'm doing something wrong because it also doesn't show in nteract.

Any pointers would be greatly appreciated!

[domoritz]

It's awesome to hear that you are working on VegaLite.jl. I'm happy to help as much as I can.

Can you compare your notebook with https://github.com/jupyterlab/jupyter-renderers/blob/master/notebooks/vega3-extension.ipynb? Does the notebook work for you?

[davidanthoff]

Ah, that is super helpful! When I open that, everything looks the way it should. And there is a key difference between what I generated and that file: in my case the vega-lite spec is inside a string, whereas in the file that works the JSON from the vega-lite spec is just part of the notebook JSON. So, I just have to figure out how to get that kind of output and we might be good. I'll report back.

[davidanthoff]

Alright, just waiting for JuliaLang/IJulia.jl#621 to be merged, and then it should all be good.

[domoritz]

🎉

[davidanthoff]

Ok, now all working end-to-end :) Thanks for the help!