Streaming UI: Advanced Error Recovery

Introduction

In modern web applications, especially those leveraging streaming UI and progressive rendering, handling errors gracefully is crucial. This lesson discusses advanced error recovery techniques to ensure a responsive user experience even when issues arise.

Key Concepts

Error Handling Strategies

To effectively manage errors in streaming UIs, consider the following strategies:

• Graceful degradation: Provide a fallback UI when an error occurs.
• Retry mechanisms: Automatically retry failed requests after a specific interval.
• User notifications: Inform the user of the error and suggest possible actions, such as refreshing the page.
• Logging and monitoring: Capture errors for analysis and troubleshooting purposes.

Example: Retry Mechanism

Here’s a simple code example demonstrating a retry mechanism when fetching data:

async function fetchData(url, retries = 3) {
    for (let i = 0; i < retries; i++) {
        try {
            const response = await fetch(url);
            if (!response.ok) throw new Error('Network response was not ok');
            return await response.json();
        } catch (error) {
            console.error('Fetch attempt failed:', error);
            if (i === retries - 1) throw error; // Re-throw error after final attempt
            await new Promise(res => setTimeout(res, 1000)); // Wait before retrying
        }
    }
}
                

Best Practices

Implementing error recovery effectively requires following key best practices:

1. Design for failure: Anticipate errors and plan for them in your UI design.
2. Keep users informed: Use clear messaging to communicate errors and recovery actions.
3. Test rigorously: Simulate various error scenarios during testing to ensure robust handling.
4. Utilize logging: Implement logging to monitor errors in production.

FAQ