Function union

Creates a union decoder from an array of decoders. Union decoder checks if input value matches any of the provided decoders.

Example

const fooDecoder = D.object({ common: D.number , foo: D.string });
const barDecoder = D.object({ common: D.number, bar: D.string });
// Creates a union which will successfully decode { common: 1, foo: 'a' } and { common: 3, bar: 'b' }
const unionDecoder = D.union([barDecoder, fooDecoder])