This bar chart visualizes employee salary against years of experience using React and D3 v5. The code fetches salary data from a CSV file via `d3.csv`, samples the first 15 records, and renders an SVG with `scaleBand` for the categorical y-axis and `scaleLinear` for the salary x-axis. Gridlines, axis ticks, and rectangles for bars are drawn directly in the SVG, produced by React components.