Identifying a Date value in an object type

If I iterate through an object type, I can look at each key:value and do this:

if (value.extends(type.number) { // Do some stuff 
}
if (value.extends('boolean') { // Do some different stuff 
}

if (value.extends(type.number) { // Do some stuff 
}
if (value.extends('boolean') { // Do some different stuff 
}

How am I meant to check if a value is a Date?

I have something like this:

const schema=type(
    {
        id: 'number',
        last_updated: 'Date'
    }
)

const schema=type(
    {
        id: 'number',
        last_updated: 'Date'
    }
)

If I iterate through the keys of a type like this looking for a Date type, I can't match it in the way I can match Boolean or number.

if (value.extends('Date')) { // some stuff 
}
if (value.extends(type('Date'))) { // some stuff 
}

if (value.extends('Date')) { // some stuff 
}
if (value.extends(type('Date'))) { // some stuff 
}

Neither of these work.

arktype•2y ago•

38 replies

If I iterate through an object type, I can look at each key:value and do this:

if (value.extends(type.number) { // Do some stuff 
}
if (value.extends('boolean') { // Do some different stuff 
}

if (value.extends(type.number) { // Do some stuff 
}
if (value.extends('boolean') { // Do some different stuff 
}

How am I meant to check if a value is a Date?

I have something like this:

const schema=type(
    {
        id: 'number',
        last_updated: 'Date'
    }
)

const schema=type(
    {
        id: 'number',
        last_updated: 'Date'
    }
)

If I iterate through the keys of a type like this looking for a Date type, I can't match it in the way I can match Boolean or number.

if (value.extends('Date')) { // some stuff 
}
if (value.extends(type('Date'))) { // some stuff 
}

if (value.extends('Date')) { // some stuff 
}
if (value.extends(type('Date'))) { // some stuff 
}

Neither of these work.