JTD timestamp validation option - string/date/either

[jrr]

What version of Ajv you are you using?
8.0.5

What problem do you want to solve?
The JTD timestamp type currently accepts both Date objects and properly-formatted strings. I'd like to be able to restrict this to just Dates.

What do you think is the correct solution to problem?
Perhaps a new option?

Something like

type JtdTimestampOption = "dateObject" | "isoString" | "both";

// then add to JTDOptions e.g.:
timestampAccepts?: JtdTimestampOption

With a default of "both".

Will you be able to implement it?

I think so.

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Related: ajv-validator/ajv-keywords#166

[epoberezkin]

let's make a bit shorter/simpler:

timestamp?: "date" | "string" // with missing/undefined property to allow both

[epoberezkin]

it should be defined in core.ts, and then all subclasses other than jtd.ts could override it as never