Loosen the is
check for optionalized
#737
Merged
+21
−2
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The breaking change at 06eddbb introduced a codec that bahaves like
partial
but strips explicitundefined
properties when decoding and encoding. This is only used byoptionalized
, and it turns out it is broken at runtime, particularly in codebases that don't setexactOptionalPropertyTypes
. It defaults to off, and much code treats "key not present" and "key set toundefined
" interchangeably. Some combinators inio-ts
such asunion
rely onis
to determine which codec to use when encoding, so when anoptionalized
codec is used in a union, and is passed an object with defined-undefined properties to encode, it results in an exception. This change fixes that by loosening up the runtimeis
check.BREAKING CHANGE: explicit undefined properties are now accepted by
optionalized.is