{"version":"1.0","type":"rich","title":"Test D3","description":"This example displays a single circle centered within an SVG canvas, sized to half the height of the 960×500 viewport. It demonstrates minimal D3.js v5 usage, where the `select` function targets the existing SVG element and `append` creates the circle shape. The circle’s radius, x-coordinate, and y-coordinate are set via the `attr` method, using the hard-coded dimensions for height and width. The page is styled with CSS, setting a monospace font and removing margins, while the circle itself is rendered with default black fill.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"","width":960,"height":500,"cache_age":3600}