{"version":"1.0","type":"rich","title":"Concept of Merge_Join _Functions_Modules","description":"This example demonstrates how merge and join functions work in D3 by animating a set of circles whose positions, radii, and count change over time via a `setInterval` timer. It shows how `selectAll`, `data`, and `join('circle')` merge new data with existing SVG elements, while separate `vizData.js` modules use ES6 `import`/`export` syntax to keep the code scalable. The visualization uses `d3.range` to generate data points and `d3.select` to append an SVG to the body, with the animation updating every 200 milliseconds.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d9e84fcce08c46c19f46d6444e0db223?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}