Responding to Resize
This example demonstrates how an SVG visualization can dynamically respond to browser window resizing. It draws two thick green lines forming an X across a container that fills the page using CSS positioning. The code uses D3 v5’s selection and data-join methods (`selectAll`, `enter`, `merge`) to update the lines’ coordinates. It captures the container’s current dimensions via `clientWidth` and `clientHeight`, then sets the SVG’s width and height attributes accordingly. A `resize` event listener triggers the `redraw` function, which recalculates the X based on the new size.