This example shows the proportion of flight delays for different airlines, displayed as a series of overlapping filled areas. It loads CSV data from a GitHub gist and maps each delay category—such as carrier, weather, or national airspace—to a colored area using d3.area, positioned with d3.scaleBand on the x-axis and d3.scaleLinear on the y-axis. The chart includes axes with labels and a legend, all rendered as SVG via D3 v6.