Function isDefined

  • isDefined<T = unknown>(
        val?: T,
        errorOrMessage?: string | Error,
    ): asserts val is NonNullable<T>

    This function calls isNotNullOrUndefined and is used to assert that a value is defined.

    Type Parameters

    • T = unknown

    Parameters

    • Optionalval: T
    • OptionalerrorOrMessage: string | Error

    Returns asserts val is NonNullable<T>

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