Description
May 1, 2020 Update by @chriddyp - This is now possible with conditional formatting. See https://dash.plotly.com/datatable/conditional-formatting & https://community.plotly.com/t/datatable-conditional-formatting-documentation/38763.
We're keeping this issue open for built-in heatmap formatting that doesn't require code-intensive conditional formatting constructs.
I use a combination of pandas and dash-table, as I guess many do.
pandas can output tables to HTML. In addition, they've made it possible that you can pass in colourmaps, which, in combination with a cell's numerical content, can be used to make a simple heatmap. Example from the docs
I believe that something like this would already be possible using datatable, by comparing cell contents to a colourmap and using these to derive a background colour. (I wonder if anyone has a recipe for this?)
Even so, I think this would make a nice feature for the datatable, since you could in many ways copy the implementation inside pandas, background_gradient or cmap or whatever during instantiation of the datatable. If not, a recipe using conditional styling would still be great.
There was support for heatmaps here, but the issue ended after conditional formatting was added.