This example demonstrates how a D3.js visualization can dynamically respond to browser resizing events. The chart container fills the viewport using CSS positioning, and a redraw function retrieves the computed `clientWidth` and `clientHeight` to update the SVG element’s dimensions. Two diagonal lines are drawn from corner to corner to visually confirm the current size. The code uses the `resize` window event listener and D3 v5’s `.selectAll`, `.merge`, and `.attr` methods, though the initial call to `redraw()` is commented out.