Animated bar chart built with D3.js v2 and jQuery that visualizes category-based data through vertically scaled rectangles. The SVG renderer applies a drop-shadow filter via `feGaussianBlur` and `feOffset`, while `d3.svg.axis` generates tick labels from a caption mapper. Bars are positioned using an ordinal x-scale with `rangeRoundBands` and a linear y-scale, with mouse-triggered interactions suggested by the attached animation.