Fork of Circles with D3
This fork of the Circles with D3 example displays seven semi-transparent colored circles against a pale green background. The visualization demonstrates the D3 General Update Pattern using `select`, `data`, and `join` to bind circle elements to an array of position, radius, and color values. The code uses method chaining with `.attr` to set `cx`, `cy`, `r`, `fill`, and `opacity` properties, adapting the SVG dimensions to the container's client width and height. The example serves as a tutorial for data-driven rendering with D3.js.