# Best Practices
URL: https://pro.rv-grid.com/guides/faq/patterns/
Source: src/content/docs/guides/faq/patterns.mdx
When working with advanced data grids designed for large datasets, several key UI patterns and practices should be followed to ensure a seamless user experience and maintain high performance.

These patterns help create an interface that is intuitive, responsive, and efficient, even with significant data volumes. Here are some of the most important patterns to follow:

1. **Virtual Scrolling**
   - **Pattern**: Efficient handling of large datasets by rendering only visible rows and columns, reducing browser load.
   - **Best Practice**: Ensure custom rendering or plugins are compatible with virtual scrolling. Avoid heavy DOM manipulations outside the visible viewport to optimize performance.

2. **Lazy Loading**
   - **Pattern**: Load data as needed rather than all at once to improve performance.
   - **Best Practice**: Implement lazy loading, particularly with external data sources or APIs, ensuring data is fetched and rendered efficiently in chunks.

3. **Data Virtualization**
   - **Pattern**: Keep only a subset of data in memory, fetching and rendering only the data that is visible or near visible.
   - **Best Practice**: Ensure features like sorting, filtering, and grouping are optimized for large datasets and compatible with data virtualization.

4. **Custom Cell Renderers**
   - **Pattern**: Create custom renderers for complex cell content, such as images, buttons, or interactive elements.
   - **Best Practice**: Keep custom cell renderers lightweight to avoid performance bottlenecks. Optimize expensive operations that are repeated across many cells. Use cache mechanisms to improve performance.

5. **Responsive Design**
   - **Pattern**: Adapt grid layouts to varying screen sizes and resolutions.
   - **Best Practice**: Ensure the grid adjusts to different screen sizes with resizable columns and scrollable content. Use responsive features to manage column visibility or prioritize important data on smaller screens.

6. **Keyboard Navigation**
   - **Pattern**: Support keyboard navigation for seamless user interaction, especially for power users.
   - **Best Practice**: Ensure custom features integrate well with keyboard navigation, maintaining or enhancing keyboard accessibility. Consider custom keyboard shortcuts where applicable.

7. **Infinite Scrolling**
   - **Pattern**: Load additional data as the user scrolls down or across the grid.
   - **Best Practice**: Implement or support infinite scrolling, especially for large datasets, providing a smoother user experience compared to traditional pagination.

8. **Column and Row Pinning**
   - **Pattern**: Keep specific rows or columns visible while scrolling through the data.
   - **Best Practice**: Support pinning in customizations, especially for grids where headers or key identifiers need to remain visible.

9. **Custom Sorting and Filtering**
   - **Pattern**: Implement custom logic for sorting and filtering to provide more complex or domain-specific data interactions.
   - **Best Practice**: Ensure custom sorting and filtering are optimized for performance, potentially applying logic on the server-side for large datasets.

10. **Editable Cells and Inline Editing**
    - **Pattern**: Allow users to edit data directly within the grid for more intuitive data manipulation.
    - **Best Practice**: Ensure inline editing is user-friendly, supports keyboard shortcuts, and includes robust data validation and error handling.

11. **Event Handling and Customization**
    - **Pattern**: Hook into various events (e.g., cell click, row hover) for custom behaviors.
    - **Best Practice**: Optimize event listeners and clean them up when no longer needed to avoid performance issues and memory leaks.

12. **Context Menus and Tooltips**
    - **Pattern**: Enhance user interaction by providing additional options or information through context menus and tooltips.
    - **Best Practice**: Implement contextually aware and lightweight context menus and tooltips to ensure they don't interfere with performance.

13. **Theming and Custom Styling**
    - **Pattern**: Customize themes and styling to align the grid’s appearance with the overall application design.
    - **Best Practice**: Use CSS variables and custom properties for consistent and easy-to-manage styles, ensuring custom styles do not conflict with core styles or degrade performance.

14. **State Management**
    - **Pattern**: Manage the grid’s state (e.g., selected rows, applied filters) for consistency, especially in complex applications.
    - **Best Practice**: Integrate with a state management solution if necessary, ensuring the grid’s state is preserved across sessions or navigation.

15. **Big O Notation Considerations**
    - **Pattern**: Understand the computational complexity of operations to ensure performance remains optimal as data size increases.
    - **Best Practice**: Evaluate and optimize algorithms, especially for sorting, filtering, and rendering, to ensure they are efficient and scale well with large datasets.

16. **Accessibility (a11y)**
    - **Pattern**: Ensure the grid is accessible to all users, including those with disabilities.
    - **Best Practice**: Follow accessibility best practices, such as providing proper ARIA labels, ensuring keyboard accessibility, and supporting screen readers. Test with accessibility tools to identify and fix issues.

By adhering to these patterns, you can create an implementation that is not only performant and scalable but also user-friendly and accessible. These practices will help you build grids that efficiently handle large datasets while providing a seamless and intuitive user experience.
