Fork of Fork of Circles with D3
This example displays seven colorful circles of varying sizes and positions on a pastel green background, each with a semi-transparent fill. The visualization demonstrates the D3 General Update Pattern by binding an array of objects containing x, y, radius, and color properties to SVG circle elements using `d3.select`, `data`, and `join`. The code imports D3 v7 and dynamically sizes the SVG to fit its container, applying attributes like `cx`, `cy`, `r`, `fill`, and `opacity` through method chaining.