decoders

• New decoders:

  • describe: change the error message for an existing decoder

• Add support for Flow 0.153.x

• Drop support for Node 13.x (unstable)

• TypeScript: Add missing export for tuple1

TypeScript types:

• Add missing export for nonEmptyString

• Returned objects that are the result from object(), inexact(), and exact() decoders will no longer contain explicit undefined values for optional keys, but instead those keys will be missing in the returned object entirely. (#574, thanks @w01fgang!)

• Add missing exports for nonEmptyArray and nonEmptyString (for TypeScript)

• Include an error code with every FlowFixMe suppression (Flow 0.132.x compatibility)

• New decoders:
  • json: decodes any valid JSON value
  • jsonObject: decodes any valid JSON object
  • jsonArray: decodes any valid JSON array

• New decoders:

  • inexact(): like object, but retain any extra fields on the input value as unknown.
    For more information, see The difference between object, exact, and inexact.
  • iso8601: for decoding ISO8601-formatted date strings

• Improved type inference for object() and exact() decoders (see #515, thanks @dimfeld)

• DecoderType is now an alias for $DecoderType (to support both TypeScript and Flow conventional naming)

• GuardType (and $GuardType) is a new type function to extract the type of a guard instance

• New decoder lazy(): lazily-evaluated decoder, suitable to define
  self-referential types.

• Fix compatibility with Flow 0.127.0

• Fix compatibility with Flow 0.126.0+

• Upgrade debrief to correct (final) version

• Fix issue where infinite recursion occurs when input object (the object being validated) contains a circular reference

• Republish due to an NPM outage

New decoders:

• To complement the tuple family of decoders, there's now also tuple1 (thanks
  @sfarthin!)

• Also fix Flow type bugs when Flow option exact_by_default=true in debrief dependency

New decoders:

• nonEmptyString: like string, but will fail on inputs with only whitespace
  (or the empty string)

• nonEmptyArray: like array, but will fail on inputs with 0 elements

Fixes:

• Fix Flow type bugs when Flow option exact_by_default=true is enabled

May cause breakage for Flow users:*

• Fix subtle bug in object() and exact() Flow type definitions that could
  cause Flow to leak any under rare circumstances.

(*: For TypeScript users, this version is identical to v1.16.1.)