This example demonstrates how to make a visualization respond to browser resizing by redrawing SVG content to match the container’s current dimensions. The code uses D3 v5 to create a blue X composed of two `<line>` elements, whose coordinates are recomputed whenever the window fires a resize event. It reads the computed width and height from the chart `<div>` using `clientWidth` and `clientHeight`, then updates the SVG’s `width` and `height` attributes accordingly. The rendering relies on standard D3 data joins and attribute setters.