Describe your problem and how to reproduce it:
This is expected to work, and it works in the preview.
There is a space before and after the = symbol.

  [type = 'checkbox'] {
    margin-top: 10px;
    margin-bottom: 15p

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The new (v5.8) Vega heatmap and isocontour transform requires "raster grids (matrices)"
input data format as seen in these Vega example data files:

 https://github.com/vega/vega/blob/master/docs/data/volcano.json
 https://github.com/vega/vega/blob/master/docs/data/annual-precip.json

It would be helpful to add explanation of this data format in the documentation:

  https://v

Most items coming from questions on the community forum

• a proper multicategory bar example based on https://community.plotly.com/t/multicategory-axis-type-example/26392
• example of shape or annotation covering several subplots thanks to xref='paper'. Also the shapes and annotations tutorial should link to each other.
• orthographic projection example in 3d axes tutorial (or