{"version":"1.0","type":"rich","title":"d3 Bland Canvas","description":"A full-window SVG renders a single rounded rectangle over a light gray background. Using D3 v5, the example selects the root `svg` element, sets its dimensions from the browser viewport, and appends a `rect` with a 40-pixel corner radius via `selection.append` and `attr`. The code draws no data; it demonstrates basic D3 selection, styling, and SVG shape creation in a minimal canvas.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c79b8337c9fa4bd3bd0c18230ad32072?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}