When you want your charts to do more than simply display data, Recharts provides interactive features that help users explore information more deeply. Two of the most commonly used interactive components in Recharts are Tooltip and Legend. These elements not only improve the visual appeal of your charts but also make them more informative and easier to understand.

The Tooltip component displays extra information when users hover over or interact with a chart element, such as a bar or a line point. You can easily add a tooltip to your chart by including the <Tooltip /> component inside your chart component. By default, it shows the data value and label for the hovered item, but you can customize its appearance and what it displays. The content prop allows you to provide a custom rendering function or component, giving you full control over the tooltip layout and style. You can also control its position, formatting, and even filter which data fields are shown.

The Legend component helps users identify what each color or shape in your chart represents. Adding <Legend /> to your chart will automatically generate a legend based on your data series. You can customize legends by using the content prop, just like with tooltips, to render your own legend layout. Other props, such as layout, align, and verticalAlign, let you position the legend horizontally or vertically, and align it within the chart area. You can also style the legend with custom CSS or inline styles to match your application's look and feel.

Beyond these built-in components, Recharts charts support event handling to enable even richer interactivity. You can use event props such as onClick, onMouseOver, and onMouseOut on chart elements like <Bar>, <Line>, or <Pie>. These events let you respond when users interact with specific data points. For instance, you might use onClick to trigger a drill-down, revealing more detailed information about a particular segment. onMouseOver can be used to highlight a bar or line, making it stand out visually, while onMouseOut can remove the highlight.

To implement these features, you add the appropriate event handler props to the chart series components. Inside these handlers, you can access information about the data point that was interacted with, and update your component state or trigger other application logic as needed. This approach allows you to create highly interactive and user-friendly data visualizations.