This example displays multiple boxplots for four categories of numeric data, with controls to switch the y-axis between linear and log10 scales. Users can toggle entire categories on and off using dynamically generated checkbox labels. The visualization renders as SVG and uses d3.scaleBand for the x-axis and d3.scaleLinear for the y-axis. A tooltip is partially implemented but not functional; the code references d3.v5 and is adapted from an external bar chart and toolkit example.