This example visualizes electronic sales data from 2013 to 2021 using a combined line and area chart rendered as SVG. It plots yearly sales values on a time-scaled x-axis and a linear y-axis, with the line and area paths smoothed using `curveBasis`. The code uses d3.csv to load the data, `scaleTime` and `scaleLinear` for scales, and `axisLeft`/`axisBottom` for tick rendering, while custom CSS colors the line red and the area wheat.