isOptionalFilled

Type guard that checks that an optional contains a value.

Interactive example

Syntax

function isOptionalFilled<
	GenericInput extends unknown
>(
  input: GenericInput
): input is Extract<GenericInput, EitherOptionalFilled>;

Parameters

• input: Result of optional.

Return value

true if the value is defined.

See also

• whenIsOptionalFilled.
• isOptionalEmpty.