82. D3 Mouseover

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82. D3 Mouseover

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Last edited Feb 23, 2026

Created on Feb 23, 2026

A static bar chart displays a dataset of 20 numeric values as vertical bars with blue fills and white value labels. Using the D3.js v4 library, the example demonstrates a basic mouseover interaction: hovering over any rectangle changes its fill color to orange. The visualization is built with SVG elements generated through `d3.scaleBand` for x-axis positioning, `d3.scaleLinear` for y-axis scaling, and event listeners attached via the `.on("mouseover", ...)` method. The code creates the SVG container, binds data to rectangle and text elements, and applies the color change directly to the selected node.

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