fp-ts recipes

1 tested fp-ts integration recipe with io-ts. Exact pinned versions and a last-passed receipt, last run 2026-10-16.

io-ts codec decode and encode

Define io-ts runtime codecs for an object, optional fields, unions, arrays and a branded type, then decode unknown input, report errors with PathReporter and encode back to plain JSON offline.

io-ts@2.2.22fp-ts@2.16.11tsx@4.23.15

last passed 2026-10-16 20:33 UTC

Used together with fp-ts

io-ts