{"version":"1.0","type":"rich","title":"d3.js learning","description":"A stacked bar chart shows the changing composition of four product categories across five years, from 2006 to 2010. The visualization uses d3.v3 with SVG rendering, building layers via `d3.layout.stack()` and mapping time with `d3.time.format`. Bars are colored per category, with a legend and interactive tooltips that display each segment’s value on mouseover. The data is embedded as JavaScript objects, not loaded from a file.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/35cb2780aa8c4c438fc5f196a42a03c1?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}