This demo shows an interactive SDCurve.js curve editor where users can manipulate a spline defined by four control points. The SVG rendering displays a white curve over a dark background, with the curve dynamically subdivided and smoothed using the dyn-levin algorithm. The code loads biographical data from a TSV file containing 19th-century women writers, though the data-loading routine appears incomplete. Built with React and D3 v3, the visualization supports mouse interaction, including dragging control points and adjusting curve resolution and degree parameters.