This example demonstrates how a D3.js visualization can respond to browser resizing by drawing a large green X that spans the full width and height of the viewport. The chart container fills the page using CSS, and the `redraw` function reads the container’s `clientWidth` and `clientHeight` to set the SVG’s dimensions. Two `<line>` elements are bound to data and updated on each resize event via `window.addEventListener("resize", redraw)`. The code uses D3 v5 with SVG rendering, showing a minimal pattern for dynamic sizing.