Delta from the previous report for the same metric instance.
Stable id generated by web-vitals for deduplication.
Metric name.
Navigation type associated with the metric.
Rating based on Web Vitals thresholds.
Unix timestamp in milliseconds for when the metric was recorded.
Current metric value. Units depend on the metric: CLS is unitless, others are milliseconds.
Serializable Web Vitals metric captured from the
web-vitalspackage.