Web/JavaScript/Reference/Global objects/Array/toString

The toString() method returns a string representing the specified array and its elements.

Syntax

arr.toString()

Return value

A string representing the elements of the array.

Description

The Array object overrides the toString method of Object. For Array objects, the toString method joins the array and returns one string containing each array element separated by commas.

JavaScript calls the toString method automatically when an array is to be represented as a text value or when an array is referred to in a string concatenation.

ECMAScript 5 semantics

Starting in JavaScript 1.8.5 (Firefox 4), and consistent with ECMAScript 5th edition semantics, the toString() method is generic and can be used with any object. Object.prototype.toString() will be called, and the resulting value will be returned.

Examples

Using toString

const array1 = [1, 2, 'a', '1a'];

console.log(array1.toString());
// expected output: "1,2,a,1a"

Specifications

Specification
ECMAScript (ECMA-262)The definition of 'Array.prototype.toString' in that specification.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
`toString`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 4	Safari Full support 1	WebView Android Full support ≤37	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0	nodejs Full support 0.1.100

Legend

Full support: Full support