ParseArgsOptionDescriptor

The value to assign to the option if it does not appear in the arguments to be parsed. The value must match the type specified by the type property. If multiple is true, it must be an array. No default value is applied when the option does appear in the arguments to be parsed, even if the provided value is falsy.

Whether this option can be provided multiple times. If true, all values will be collected in an array. If false, values for the option are last-wins.

A single character alias for the option.

Type of argument.