This example visualizes doping allegations among the 35 fastest recorded times up Alpe d’Huez, plotting each cyclist’s year against their finishing time. Blue and red dots distinguish riders without and with doping allegations, with a legend and axis labels. The interactive tooltip reveals the rider’s name, nationality, year, time, and doping details on hover. Built with React and D3 v7, it uses `scaleLinear`, `scaleOrdinal`, and `extent` to map data from a freeCodeCamp JSON source, rendering SVG circles and handling mouse events via `select` and `append`.