This example demonstrates how a D3.js visualization can respond dynamically to browser resizing. It shows a large green X spanning the entire viewport, where the lines are drawn based on the current window dimensions. The code uses D3 v5 with SVG rendering, fetching the container’s client width and height via `clientWidth` and `clientHeight`, then updating the SVG attributes accordingly. A resize event listener triggers the `redraw` function whenever the window size changes.