Is array contains supported?

[joshuaavalon]

https://json-schema.org/understanding-json-schema/reference/array.html#contains

contains is keyword of draft 6 but it does not seem to be exists on ArrayOptions. Is array contains supported?

[sinclairzx81]

@joshuaavalon Hi,

TypeBox doesn't expose the contains keyword (currently) as it's not supported in the type checkers, however you are still free to specify the contains keyword (as well as minContains and maxContains) on the ArrayOptions.

The following is fine if using Ajv.

// Expect an array of numbers, one or more should be equal to 1.
const T = Type.Array(Type.Number(), {
  contains: Type.Literal(1),
})

Maybe I should implement type checker support for this keyword? (There's some considering going into implement additional keywords that mean little to TS, but can be useful on the validation side, other examples include if/then/else, dependentRequired etc)

Hope this helps
S