Fork of Circles with D3
This example demonstrates how to create and manipulate circles using D3.js, showing a set of overlapping colored circles positioned on a light background. The code uses D3’s `select`, `selectAll`, `data`, and `join` methods to bind an array of circle objects—each specifying x, y, radius, and fill color—to SVG circle elements. It applies method chaining to set attributes like `cx`, `cy`, `r`, `fill`, and `opacity`, highlighting the data-driven approach and the general update pattern within a reusable `main` function.