This example demonstrates how a D3.js v5 SVG visualization can respond dynamically to browser window resizing. It draws a green X composed of two thick lines whose coordinates are recalculated on every resize event. The code uses `clientWidth` and `clientHeight` to measure the chart container’s CSS-computed dimensions, then updates the SVG’s `width` and `height` attributes accordingly. A window `resize` event listener triggers the `redraw` function, which re-renders the lines based on the new size, showing a simple pattern for responsive data visualizations.