This example demonstrates how a D3.js visualization can respond dynamically to browser resizing. A green X-shaped pair of lines is drawn across the full viewport, with the SVG dimensions updated to match the CSS-computed container size on every resize event. The code uses `chartDiv.clientWidth` and `chartDiv.clientHeight` within a `redraw` function, triggered initially and via `window.addEventListener("resize", redraw)`. The SVG is created with `d3.select`, and lines are bound to data arrays and updated using the merge pattern.