Fork of Circles with D3
This example uses D3.js to render a set of seven semi-transparent circles of varying size, position, and color onto an SVG canvas with a light green background. The code demonstrates the D3 general update pattern and method chaining by joining an array of circle data objects to SVG elements using `selectAll`, `data`, and `join`, then setting each circle’s `cx`, `cy`, `r`, and `fill` attributes. The visualization is structured for hot reloading, with container dimensions read from `clientWidth` and `clientHeight` to make the SVG responsive.