81. D3 Hover

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Last edited Feb 23, 2026

Created on Feb 23, 2026

A simple bar chart displays twenty numeric values as vertical bars, with each bar labeled by its value and colored in a blue gradient. The example demonstrates a CSS-only hover effect, where hovering over any rectangle turns it orange. Built with D3.js version 4.5.0, the code uses `d3.scaleBand` to position bars along the x-axis, `d3.scaleLinear` for the y-axis, and SVG `rect` and `text` elements for rendering, with hover styling defined via CSS `:hover` selector.

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