Fork of Circles with D3
This example demonstrates how to create and style a set of circles within an SVG container using D3.js. It uses D3’s data binding and general update pattern, with `selectAll`, `data`, and `join` to render circle elements from an array of objects containing position, radius, and color. The visualization applies dynamic attributes like `cx`, `cy`, `r`, `fill`, and opacity, with a soft green background set via inline SVG styling.