This interactive area chart visualizes EV charging station metrics—charging ports, average charge time, daily users, and monthly energy—across station IDs. Built with D3 v7, it renders a smooth area path with an overlaid orange line and circular points, all using SVG. A dropdown menu lets users switch between metrics, triggering transitions that update the axes, grid, and data points. Hovering over a point reveals a tooltip with city details and the selected metric’s value, with data loaded from a remote CSV file.