isClass

Determine if a value was declared with `class` syntax

Usage

This function returns true if the provided value is a constructor declared with the ES6 class keyword.

import * as 
import _
_ from 'radashi'

class 
class MyClass
MyClass {}

function 
function OldSchoolClass(): void
OldSchoolClass() {
  this.
any
foo = 'bar'
}

import _
_.
function isClass<typeof MyClass>(value: typeof MyClass): value is typeof MyClass
Checks if the given value is a class. This function verifies
if the value was defined using the class syntax. Old school
classes (defined with constructor functions) will return false.
"Native classes" like Error will also return false.
@see ― https://radashi.js.org/reference/typed/isClass
@example 
isClass(class CustomClass {}) // => true
isClass('abc') // => false
isClass({}) // => false
@version ― 12.3.0
isClass(
class MyClass
MyClass) // => true
import _
_.
function isClass<ErrorConstructor>(value: ErrorConstructor): value is ErrorConstructor
Checks if the given value is a class. This function verifies
if the value was defined using the class syntax. Old school
classes (defined with constructor functions) will return false.
"Native classes" like Error will also return false.
@see ― https://radashi.js.org/reference/typed/isClass
@example 
isClass(class CustomClass {}) // => true
isClass('abc') // => false
isClass({}) // => false
@version ― 12.3.0
isClass(
var Error: ErrorConstructor
Error) // => false
import _
_.
function isClass<() => void>(value: () => void): value is never
Checks if the given value is a class. This function verifies
if the value was defined using the class syntax. Old school
classes (defined with constructor functions) will return false.
"Native classes" like Error will also return false.
@see ― https://radashi.js.org/reference/typed/isClass
@example 
isClass(class CustomClass {}) // => true
isClass('abc') // => false
isClass({}) // => false
@version ― 12.3.0
isClass(
function OldSchoolClass(): void
OldSchoolClass) // => false
import _
_.
function isClass<"abc">(value: "abc"): value is never
Checks if the given value is a class. This function verifies
if the value was defined using the class syntax. Old school
classes (defined with constructor functions) will return false.
"Native classes" like Error will also return false.
@see ― https://radashi.js.org/reference/typed/isClass
@example 
isClass(class CustomClass {}) // => true
isClass('abc') // => false
isClass({}) // => false
@version ― 12.3.0
isClass('abc') // => false
import _
_.
function isClass<{}>(value: {}): value is _.Class<unknown[], unknown>
Checks if the given value is a class. This function verifies
if the value was defined using the class syntax. Old school
classes (defined with constructor functions) will return false.
"Native classes" like Error will also return false.
@see ― https://radashi.js.org/reference/typed/isClass
@example 
isClass(class CustomClass {}) // => true
isClass('abc') // => false
isClass({}) // => false
@version ― 12.3.0
isClass({}) // => false
import _
_.
function isClass<undefined>(value: undefined): value is never
Checks if the given value is a class. This function verifies
if the value was defined using the class syntax. Old school
classes (defined with constructor functions) will return false.
"Native classes" like Error will also return false.
@see ― https://radashi.js.org/reference/typed/isClass
@example 
isClass(class CustomClass {}) // => true
isClass('abc') // => false
isClass({}) // => false
@version ― 12.3.0
isClass(
var undefined
undefined) // => false