Fork of Clickable Circles
This example displays seven translucent circles with distinct colors and radii, positioned across a fixed full-screen SVG. Clicking a circle highlights it with a black stroke and brings it to the foreground. The visualization uses D3 v7’s `selectAll` and `join` for rendering, with a unidirectional data flow pattern managing the selected state. Coordinates, sizes, and colors come from a static data array.