JavaScript Object toString()
Examples
Using toString() on an array:
const fruits = ["Banana", "Orange", "Apple", "Mango"];
let text = fruits.toString();
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let text = fruits.toString();
Using toString() on an object:
const person = {
firstName: "John",
lastName: "Doe",
age: 50,
eyeColor: "blue"
};
const keys = person.toString();
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firstName: "John",
lastName: "Doe",
age: 50,
eyeColor: "blue"
};
const keys = person.toString();
Using Object.toString() on an object:
const person = {
firstName: "John",
lastName: "Doe",
age: 50,
eyeColor: "blue"
};
const keys = Object.toString(person);
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firstName: "John",
lastName: "Doe",
age: 50,
eyeColor: "blue"
};
const keys = Object.toString(person);
Description
The toString() method returns an object as a string.
The toString() method returns "[object Object]" if it cannot return a string.
Object.toString() always returns the object constructor.
The toString() method does not change the original object.
Note
Every JavaScript object has a toString() method.
The toString() method is used internally by JavaScript
when an object needs to be displayed as a text (like in HTML),
or when an object needs to be used as a string.
Browser Support
toString() is an ECMAScript1 (JavaScript 1997) feature.
It is supported in all browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | Yes |
Syntax
object.toString()
Parameters
NONE
Return Value
A string representing the object.
Or "[object type]" if it cannot return a string.
Or "[object type]" if it cannot return a string.