An object that combines the result of a feature flag evaluation with information about how it was calculated.

This is the result of calling LDClient.variationDetail.

For more information, see the SDK reference guide.


  • LDEvaluationDetail


An object describing the main factor that influenced the flag evaluation value.

value: any

The result of the flag evaluation. This will be either one of the flag's variations or the default value that was passed to LDClient.variationDetail.

variationIndex?: null | number

The index of the returned value within the flag's list of variations, e.g. 0 for the first variation-- or null if the default value was returned.

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