{"version":"1.0","type":"rich","title":"Select a Year form Chart","description":"This visualization shows global population trends by region over time, with a movable vertical line that selects a specific year to highlight the corresponding values across all displayed series. Users can hover to change the selected year, updating the line’s position via `d3.mouse` and `scale.invert`. The chart renders multiple region lines using `d3.line` and `curveBasis`, with a color legend generated by the custom `colorLegend` module. Data comes from UN population estimates and medium-variant projections, processed with `d3.csv` and `nest`, and drawn as SVG paths.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/e5a4d64ba4ac47ca928c2ec3a3076f65?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}