{"version":"1.0","type":"rich","title":"test writing","description":"This example displays the text “Hello D3 version 7” centered in the browser using D3 v7. The page sets a large font size and uses `d3.select` to insert the message into the body element. It also includes utility code that creates a downloadable text file via the Blob API, though this feature is not actively triggered on load. The simple demonstration shows how to begin working with D3 version 7 in a minimal HTML setup.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d8a7b809f4f34591bd968149f60deb49?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}