cirkloj
This example shows seven semi-transparent circles in various neon colors on a light green SVG background, with positions, sizes, and fills defined by a static array of objects. The code uses D3.js v7, specifically the `select` function, to create the SVG element sized to its container and bind data to circle elements via the `join` method. Each circle’s `cx`, `cy`, `r`, `fill`, and `opacity` attributes are set directly from the data properties, demonstrating the D3 General Update Pattern and method chaining in a simple, static visualization.