{"version":"1.0","type":"rich","title":"Coronavirus Line Chart with Marker Lines Part I","description":"This line chart displays global cumulative COVID-19 deaths over time from the Johns Hopkins dataset, with a horizontal marker line at the one-million-death threshold. The React component uses D3 v6 functions `scaleTime`, `scaleLinear`, `extent`, `max`, and `line` to construct an SVG path. Data loading relies on `csv` and `timeParse` to transform daily country-level death counts into aggregated totals. The marker line is drawn as an SVG `<line>` element, while the path is unstyled except for a black stroke defined in the page’s CSS.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d34996fad847479d9cb7d96d0d114936?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}