How to use dom elements in canvas?

Question

Canvas

I found this option https://bl.ocks.org/lsbardel/9f61d91fae37b50dac881... where svg elements are drawn in canvas, but I can't understand the mechanics of the process. It seems that everything that is described there occurs in svg. However, it also draws on canvas

Answer 1

It draws either svg or canvas, depending on what you have chosen. What do you not understand about this example? The library https://d3js.org/ is used there, it has documentation, everything is clearly described there