eds-performance-debugging

Debugging performance in EDS blocks involves identifying bottlenecks through Core Web Vitals analysis, implementing error handling patterns with try-catch blocks, and using console logging to track asynchronous data loading. Start by measuring Lighthouse scores, then apply graceful degradation and loading state strategies to resolve slowdowns and errors.

FOUC occurs when CSS loads after content renders. Prevent it using CSS-first approaches and placeholder strategies in your EDS blocks. Apply display hiding until styles load, use inline critical CSS, and implement loading states to ensure content appears styled from the start.

Improve Core Web Vitals by optimizing asynchronous data loading, implementing performance timing instrumentation, and handling cross-browser graceful degradation. Profile block execution with console logging, eliminate render-blocking resources, and defer non-critical scripts to boost Lighthouse performance metrics.

Yes. Implement async error handling patterns with try-catch blocks to catch failures during data loading. Pair error handlers with loading state placeholders and fallback content so blocks degrade gracefully when async operations fail, preventing blank pages.

Blank pages typically result from unhandled errors during async data loading, missing error handling patterns, or FOUC prevention gaps. Debug by checking console logs for exceptions, verifying async data resolves correctly, and confirming CSS loads before content renders using this Skill's error handling and placeholder strategies.

No special tools required. Use native browser Performance API and console logging best practices to instrument timing directly in your blocks. This Skill covers implementing performance timing without external dependencies to identify where execution slows down.