JavaScript Function name Property (original) (raw)

Last Updated : 22 May, 2023

The function name property of the javascript object is used to return the name of the function. This name property of the function is only readable and cannot be altered. The name of the function which was given when the function was created is returned by Function.name.

Syntax:

Function.name

Property Values: This property has three attributes as mentioned below:

Return Value: This property returns the string i.e the name of the function.

Example: Below is a Basic example of the Function name Property.

Javascript

function func1() {

}

console.log(func1.name)

Output:

func1

More examples for the above property are provided below:

Example 1: When the simple function is given

Javascript

function func1() {

}

function func2(a, b) {

}

console.log( "Name of the function func2 is: "

`` , func1.name)

console.log( "Name of the function func2 is: "

`` , func2.name)

console.log( "Type of func.name is: "

`` , typeof (func2.name))

Output:

Name of the function func2 is: func1 Name of the function func2 is: func2 Type of func.name is: string

Example 2: When an object of function is given.

Javascript

let obj = {

`` function1: function functionName1() { },

`` function2: () => {

`` console.log( "function2 is running" )

`` },

`` function3: () => {

`` obj.function2();

`` },

}

obj.function3()

console.log( "Name of the function function1 is: "

`` , obj.function1.name)

console.log( "Name of the function function3 is: "

`` , obj.function3.name)

Output:

Name of the function function1 is: functionName1 Name of the function function3 is: function3

Example 3: Using the name property on an instance of the function.

Javascript

function func() { };

let obj = new func();

if (obj.constructor.name === "func" )

`` console.log( "obj" , obj,

`` "is an instance of function func" )

else

`` console.log( 'Oops!' )

Output:

obj[object Object]is an instance of function func

Example 4: Using the name property on the bounded function.

Javascript

function func() { };

console.log( "Name of the bounded func is: "

`` , func.bind({}).name)

Output:

Name of the bounded func is: bound func

We have a complete list of Javascript Function methods, to check those please go through this Javascript Function Complete reference article.

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