Resources to do choropleth map and the treemap

Resources to do choropleth map and the treemap
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I am stuck in the choropleth map and treemap projects of Data Visualization because I haven’t found proper resources of how to do them.
Some one know good tutorials and/or courses about that.

I am afraid there are no beginner-friendly (at least i have not come across one) tutorials for d3.js . I suggest you read their documentation Here and look at the code for the examples given in d3js.org.

Besides being difficult to pick up, there are a few resources to learn d3.js(Still wondering why) and even the available ones are for former major versions of d3.js .