{"version":"1.0","type":"rich","title":"Happiness Level Line Chart - Test","description":"This visualization displays the happiness levels of 163 countries over time, using a line chart where each line represents a country's trajectory. Users can interact with a dropdown menu to select a specific country, and the color legend allows filtering by country. The chart updates dynamically with transitions. The code uses D3 v5 APIs including `scaleTime`, `scaleLinear`, `scaleOrdinal`, `nest`, `line` with `curveBasis`, and `axisLeft`/`axisBottom`. The data comes from a CSV file, and the rendering uses SVG with animation.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/a6de5ea10b1249d6aabefe7091ba8b56?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}