This example demonstrates a visualization container with responsive axes that maintain consistent tick mark density as the chart resizes. The code uses a ResizeObserver to track container dimensions and updates a D3 v7 scatterplot-like visualization with a gray inner rectangle. Both the x and y axes compute their tick counts dynamically based on the available inner width and height, dividing by a fixed density value of 50 pixels per tick. This approach ensures the axis labels remain evenly spaced whether the viewport is large or small.