isFunction()
Last updated
Last updated
isFunction()
Checks if any
value is a function
type or the type obtained from its object
class equal to 'function'
and an instance of Function
. It also denies it's a class
by checking whether the function converted with Function.prototype.toString()
to the string
does not contain the word class
at the beginning.
Payload
extends
object
The Payload
generic type variable constrained by object
indicates the type of optional parameter payload
of the supplied callback
function and payload
optional parameter of the isFunction()
function from which it captures its value.
value: any
The value of any
type to check.
callback: ResultCallback<any, Payload>
A 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
An optional object
of the generic type variable Payload
is assigned to the payload
of the given callback
function.
value is Function
The return type is a boolean
as the result of its statement indicating the value
is a Function
.
The return value is a boolean
indicating whether the provided value
is a function
.
callback
and payload