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The Principle Analysis of Frontend Monitoring SDK
- A complete frontend monitoring platform consists of data collection and reporting, data processing and storage, and data visualization focusing on data collection and reporting.
- Monitoring SDK that implements technical concepts for better understanding and learning experience.
- Chrome developer team metrics for page performance: FP, FCP, LCP, CLS obtained through PerformanceObserver.
- Implementation code provided for monitoring FP, FCP, and LCP metrics.
- CLS (Cumulative Layout Shift) calculation method explained with impact and distance scores.
- Different CLS calculation methods: Cumulative, Average of all session windows, Maximum of all session windows.
- Implementation code for monitoring CLS using the maximum session window score.
- Monitoring DOM changes, First Screen Rendering Time, API request timing, Resource Loading Time, and Cache Hit Rate explained with implementation code.
- Browser Back/Forward Cache (BFC), FPS calculation, Vue Router Change Rendering Time explained with implementation code.
- Error data collection for resource loading errors, JavaScript errors, Promise errors, sourcemap, and Vue errors.
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