★ isString()
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isString()
Checks if value is a type(by using the ) or an instance of by using the function.
Type
extends
AnyString
=
string
A generic type variable Type
constrained by indicates type of the given via the , by default .
Payload
extends
object
=
object
The Payload
generic type variable constrained by indicates the type of optional parameter of the supplied function and optional parameter of the function from which it captures its value.
value: any
callback: ResultCallback<any, Payload>
payload?: Payload
value is Type
The value of type to check.
A callback function
of type with parameters, the that has been checked, the of this check, and of generic type variable with optional properties from the provided , to handle them before the return. By default, it uses function.
An optional of the generic type variable is assigned to the of the given function.
The return type is a as the result of its statement indicating the is a generic type variable by default equal to the .
The return value is a indicating whether the provided is a type or an instance of .