When building data visualizations in React using Recharts, it's essential to ensure your charts look great and function well on any device or screen size. The ResponsiveContainer component from Recharts allows you to achieve this by automatically resizing your charts to fit the dimensions of their parent container. To use it, wrap your chart component, such as LineChart or BarChart, inside a ResponsiveContainer. You can specify the width and height as percentages or set them to "100%" to make the chart fill the available space. The ResponsiveContainer listens for size changes in the parent element and updates the chart dimensions in real time, making your charts fluid and adaptable without extra manual calculations.

Ensuring that charts remain clear and usable on mobile devices requires more than just resizing. You should keep axes labels short, avoid overcrowding data points, and use larger font sizes and touch-friendly elements for interactions like tooltips or legends. It's a good practice to test your charts on multiple devices and orientations, ensuring that labels don't overlap and the most important data remains visible. Consider simplifying charts for smaller screens by hiding less critical data or switching to a more compact chart type. By combining ResponsiveContainer with these best practices, you can create charts that provide a consistent and accessible experience across all devices.