This example visualizes car sales data as an interactive 3D bar chart, with each bar representing a car model and its height corresponding to the number of units sold. The chart is rendered using the d3-x3d library, which bridges D3.js with X3DOM for 3D graphics in the browser. The code loads CSV data from a GitHub gist, parses it with D3’s `csv` function, and constructs the chart by calling `d3.x3d.chart.barChartMultiSeries()`. The visualization uses D3 v5 and React, with the chart placed in an HTML div via the `#chartholder` selector.