This visualization shows the top 15 YouTube channels by follower count using horizontal bars. The chart renders an SVG with D3 scales for positioning, while React manages the component state and lifecycle. Data is loaded asynchronously via d3.csv from a GitHub-hosted CSV file, with the d3.scaleBand and d3.scaleLinear APIs mapping channel names and follower values to screen coordinates. A custom grid of tick marks and labels is drawn manually rather than using d3.axisBottom.