This example shows the process of building a bar chart from scratch using D3 v5, loading data from a CSV file via `d3.csv` and rendering it as SVG elements selected with `d3.select`. The chart is constructed within an HTML page that imports the D3 library, with the visualization created dynamically through JavaScript in `index.js`. The accompanying CSS defines chart styling, including a red highlight for specific elements, while the SVG canvas is set to fixed dimensions of 960 by 500 pixels.