This interactive directed graph editor lets users create, drag, and connect nodes with labeled links, highlighting selected edges with dashed styling. The visualization is built using D3 v5's force simulation for node placement and SVG elements for rendering, with graph interactions handled through mouse events in a React application. The code uses `d3.forceSimulation` to manage node positions and link forces, while CSS controls visual feedback such as cursor changes and stroke styles. The graph is displayed in a full-window SVG canvas.