D3.js Data Visualization Build sophisticated, interactive data visualizations using d3.js (Data-Driven Documents). D3 binds data to DOM elements and applies data-driven transformations to produce publication-quality, fully customizable visuals. When to Use This Skill - Custom charts requiring unique visual encodings or layouts - Interactive visualizations with pan, zoom, or brush behaviors - Network/graph visualizations (force-directed, tree, hierarchy, chord diagrams) - Geographic visualizations with custom projections - Smooth, choreographed transitions and animations - Novel chart types no…