guardType()
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guardType()
Guards the value to be a type of given type
.
T
extends
Type
Payload
extends
object
=
object
value: T
The value of a generic type variable T
constrained by generic type Type
, by default of the type captured from itself, to guard.
type: Types<T>
The value of string
or Constructor<T>
type of the Types
indicates against which type a given value
is checked.
callback?: ResultCallback<T, Payload>
The optional callback function
of ResultCallback
type with parameters, the value
that has been checked, the result
of this check, and payload
of generic type variable Payload
with optional properties from the provided payload
, to handle them before the result
return. By default, it uses resultCallback()
function.
payload?: Payload
value is
T
The return type is a boolean
as the result of its statement indicating the value
is a generic type variable T
by default of the type captured from the supplied value
.
The return value is a boolean
indicating whether the value
is a type from a given type
of the Types
.
A generic type variable T
constrained by generic type Type
indicates captured type of the supplied value
via the return type and the parameter of the provided callback
function ResultCallback
type.
The Payload
generic type variable constrained by object
indicates the type of optional parameter of the supplied callback
function and payload
optional parameter of the guardType()
function from which it captures its value.