This diverging bar chart visualizes population percent changes across U.S. states between April 2020 and July 2019, using horizontal bars that extend left or right from a central zero axis. The visualization first loads CSV data via `d3.csv`, then applies `d3.scaleLinear` for axes and bar lengths, `d3.scaleBand` for the categorical y-axis, and `d3.scaleSequential` with an `interpolateRdBu` color scheme. A color legend is generated using `d3.legendColor` from the d3-legend plugin, while bars are rendered as SVG `<rect>` elements. The chart includes axis labels, a title, and subtitle, all styled with D3 v7.