union

DDataParser.union() tries multiple parsers in the provided order and returns the first success. On failure, all issues are aggregated to help with debugging.

Interactive example

Parameters

• options: non-empty array of parsers ([DP.string(), DP.number(), ...]).
• checkers: checkerRefine to apply a rule on the final result (e.g. forbid certain values).
• errorMessage: custom message when no option matches.

Return value

A DataParserUnion. schema.parse(data) returns DEither.success<OutputUnion> if it finds a match, otherwise DEither.error<DataParserError> containing the errors from each option.

Other examples

Extended mode

See also

• boolean - Parser for boolean values
• date - Parser for dates