API reference

FeatureFlareMetricName

Metric name literals emitted by the SDK.

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Component and config reference

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FeatureFlareMetricName

String literal union of metric names emitted by the client SDK.

More on this: see FeatureFlareReactConfig for the onMetric callback that receives these values.

export type FeatureFlareMetricName =
  | 'ff_eval_latency_ms'
  | 'ff_cache_hit_ratio'
  | 'ff_revalidate_latency_ms'
  | 'ff_realtime_lag_ms'
  | 'ff_killswitch_apply_latency_ms';

Values

ff_eval_latency_ms

Latency for individual flag evaluation or refresh work.

ff_cache_hit_ratio

Cache efficiency signal for flag lookups.

ff_revalidate_latency_ms

Latency for revalidation fetches when cached data is refreshed.

ff_realtime_lag_ms

Observed lag between a realtime event and local application of the update.

ff_killswitch_apply_latency_ms

Latency for local kill-switch application work.