matchWithStringOtherwise

matchWithStringOtherwise() handles selected members of a string literal union. Matcher keys must belong to the input union, but may omit cases. The otherwise callback receives only the literals that have no handler.

Interactive example

Syntax

Classic signature

function matchWithStringOtherwise<Input extends string, Matcher, Output>(
  input: Input,
  matcher: Matcher,
  otherwise: (value: UnhandledValues) => Output
): MatcherResult | Output

Curried signature

function matchWithStringOtherwise<Input extends string, Matcher, Output>(
  matcher: Matcher,
  otherwise: (value: UnhandledValues) => Output
): (input: Input) => MatcherResult | Output

Parameters

• input: a string literal or literal union; broad string values are rejected.
• matcher: a partial object whose keys can only be members of input. A property may be undefined to route that case to otherwise.
• otherwise: receives the exact union of cases without a handler.

Return value

The selected handler result, or the otherwise result for an unhandled value.

See also

• matchWithString - Exhaustive string matching.
• matchWithNumberOtherwise - Numeric partial matching.