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Clickable Circles with D3 and React

✓ Published4🌍 Public
223100098@lums.edu.pk
Last edited Oct 8, 2025
Created on Oct 8, 2025

A grid of pastel-colored circles, each positioned by explicit pixel coordinates from a static data array, fills the visualization. React manages the application state while D3's `select` and `join` methods render the SVG `<circle>` elements. Hovering a circle triggers a `mouseover` event that calls `setSelectedId`, updating React state and re-running the D3 selection to draw a black stroke around the active circle, while `mouseout` clears the highlight.

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