Fork of Circles with D3
This example demonstrates a fixed layout of colorful, semi-transparent circles drawn on a light green SVG background using D3.js. The visualization uses hardcoded data—an array of objects with x, y, radius, and fill color properties—to bind and render seven circles via `d3.select`, `.selectAll`, `.join`, and `.attr` calls. It showcases D3's data-join pattern and dynamic attribute styling, setting circle positions, sizes, colors, and a uniform opacity through method chaining.