This visualization demonstrates how an SVG chart can automatically resize to fill its browser window. It shows two semi-transparent green lines forming an X, which dynamically adjust their positions and lengths based on the current viewport dimensions. The implementation uses d3.select to create the SVG element, then a custom redraw function extracts the container’s clientWidth and clientHeight to update the SVG attributes. A window resize event listener triggers the redraw, while the dataset provides the line endpoints. The chart’s container is styled with CSS positioned fixed to span the entire page.