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Type parameters

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defaultValue: T

Unlike the rest of the option types, there is no sensible generic default for mapped option types. The default value for a mapped type must be specified.

help: string

The help text to be displayed to the user when --help is passed.

map: Map<string, T> | Record<string | number, T>

Maps a given value to the option type. The map type may be a TypeScript enum. In that case, when generating an error message for a mismatched key, the numeric keys will not be listed.

mapError?: string

Optional override for the error reported when an invalid key is provided.

name: string

The option name.

type: Map

The parameter type, used to convert user configuration values into the expected type. If not set, the type will be a string.

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