28. D3 Bar Chart Blues

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28. D3 Bar Chart Blues

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Last edited Feb 12, 2026

Created on Feb 9, 2026

A bar chart displays a fixed dataset of 20 numeric values in a viewport 500 pixels wide and 100 pixels high. Each bar’s height is proportional to the data value, scaled by a factor of four, and its horizontal position is computed from the array index and overall width. The bars are rendered as SVG rectangles using the D3.js v4.5.0 library, with a dynamic fill color that transitions from dark to lighter blue based on the data value. This example demonstrates simple data-driven styling without any animation or interactive elements.

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