This interactive bar chart visualizes donor data in Croatia, showing the percentage of donation actions and amounts by donor type, with a toggleable breakdown for COVID-19 versus other purposes. Built with React and D3 v6, it renders SVG marks using `scaleBand` and `scaleLinear`, with interactive menu buttons that switch between total, COVID-19, and other categories. The chart uses striped overlays via SVG `<pattern>` and `<mask>` to distinguish overlapping data, with tooltips on mouse hover. Data comes from a CSV file loaded with `d3.csv`, and the legend updates dynamically based on the selected category.