This interactive bar chart visualizes internet usage percentages across countries, with controls to filter by year and select the top 20, bottom 20, or countries surrounding a user-specified nation. Built with React and D3 v7, it renders an SVG using d3.scaleBand and d3.scaleLinear, and updates the chart via d3.select and data joins. Hovering over bars triggers a tooltip displaying the exact percentage, while input fields and dropdown menus drive the filtering logic. The data comes from a CSV file fetched with d3.csv.