JavaScript object toString() method

Definition and usage

toString() The method returns the object as a string.

If toString() The method cannot return a string and returns "[object Object]" instead.

Object.toString() Always returns the object constructor.

toString() The method does not change the original object.

Description

Every JavaScript object has toString() Method.

When JavaScript needs to display an object as text (such as in HTML) or use an object as a string internally, toString() Method.

Normally, you would not use it in your own code.

Instance

Example 1

Using toString() on an array:

const fruits = ["Banana", "Orange", "Apple", "Mango"];
let text = fruits.toString();

Try it yourself

Example 2

Using toString() on an object:

const person = {
  firstName: "Bill",
  lastName: "Gates",
  age: 19,
  eyeColor: "blue"
};
const keys = person.toString();

Try it yourself

Example 3

Using Object.toString() on an object:

const person = {
  firstName: "Bill",
  lastName: "Gates",
  age: 19,
  eyeColor: "blue"
};
const keys = Object.toString(person);

Try it yourself

Syntax

object.toString()

Parameter

No parameters.

Return value

Type Description
String Represents the string of the object.
"[object type]" If it fails to return a string.

Browser support

toString() Is ECMAScript1 (ES1) feature.

All modern browsers support ES1 (JavaScript 1997):

Chrome IE Edge Firefox Safari Opera
Chrome IE Edge Firefox Safari Opera
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Related pages

JavaScript object

JavaScript object definition

JavaScript object method

JavaScript object property