{"version":"1.0","type":"rich","title":"Selecting a Year on a line chart","description":"This interactive line chart displays population changes over time for multiple world regions, using a vertical black line to mark a user-selected year. Moving the mouse across the chart updates the selected year, which is reflected in the line’s position. The visualization is built with D3 v5, using `d3.line` for the paths, `d3.axisBottom` and `d3.axisLeft` for axes, and a `mousemove` event listener on a transparent overlay rect to trigger year changes. Data comes from UN population estimates and medium variant projections, rendered as SVG.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/3abcb8e50e8d47b6a4fd4f4e99ca7987?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}