{"version":"1.0","type":"rich","title":"Blank Canvas","description":"A blank, rounded rectangle fills the entire browser viewport, rendered in muted gray as a purely visual placeholder. The example demonstrates the simplest possible D3.js v5 SVG setup, drawing a single `<rect>` element that adapts to the window's dimensions. The code logs the viewport's width and height to the console, then uses D3's `select` to append the rectangle with `rx` corner radius to an empty `<svg>`. Styling via CSS fixes the body's position and hides overflow, ensuring the canvas remains static regardless of scroll or resize.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/77f9049ec99d4cc3be702bb5b41e9ef7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}