This example displays average salaries for data science job categories and experience levels, with a toggle allowing users to switch between grouping by job category and by experience level. Each bar represents the average salary in USD computed from the provided CSV dataset, aggregated across matching job titles and levels. The visualization uses D3 v6 with SVG rendering, employing `d3.scaleBand` for the x-axis and `d3.scaleLinear` for the y-axis to map values. Interactive buttons trigger re-renders, clearing and redrawing the bar chart with updated data groupings.