JavaScript Function name Property

Last Updated : 22 Jan, 2026

In JavaScript, functions are objects and come with built-in properties. The name property is used to identify a function by returning the name assigned at the time of its creation.

  • Function.name returns the original name of the function.
  • The name property is read-only and cannot be modified.
  • It is useful for debugging, logging, and stack traces.
JavaScript 
function greet() {
  console.log("Hello!");
}

console.log(greet.name);

Syntax:

Function.name

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

  • Writable: No
  • readable: No
  • configurable: Yes

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 
// Creating function name func1
function func1() {
}
console.log(func1.name)

More examples for the above property are provided below:

[Example 1]: When the simple function is given

JavaScript 
// Creating function name func1
function func1() {
}
// Creating function name func2
function func2(a, b) {
}
console.log("Name of the function func2 is: "
    , func1.name)
console.log("Name of the function func2 is: "
    , func2.name)

// Logging return type to console
console.log("Type of func.name is: "
    , typeof (func2.name))

[Example 2]: When an object of function is given.

JavaScript 
// Creating object of functions
let obj = {
    function1: function functionName1() { },

    function2: () => {
        console.log("function2 is running")
    },
    function3: () => {
        obj.function2();
    },
}
obj.function3()
// Calling object function1 but function 
// name is functionName1
console.log("Name of the function function1 is: "
    , obj.function1.name)
console.log("Name of the function function3 is: "
    , obj.function3.name)

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

JavaScript 
// Function func
function func() { };
// Obj is the instance of the 
// function object func
let obj = new func();
if (obj.constructor.name === "func")
    console.log("obj", obj,
        "is an instance of function func")
else
    console.log('Oops!')

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

JavaScript 
// Function func
function func() { };
// Logging bounded function to console.
console.log("Name of the bounded func is: "
    , func.bind({}).name)
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