This example demonstrates a flexible, scalable bar chart built with D3.js (v4.5.0), using ordinal and linear scales to map a static dataset of 20 values to SVG rectangles. The chart uses `d3.scaleBand` for the x-axis positioning with padding and `d3.scaleLinear` for y-axis height, rendering bars and white value labels. The bars’ fill colors are dynamically computed from their values, creating a gradient from dark to light blue. The visualization appears static with no animation or interactions.