Widely availableSupported across all major browsers. Safe to use in production.
Arrays Widely available

Array.isArray()

The Array.isArray() static method checks whether a value is an array.

Arrays

Overview

The Array.isArray() static method checks whether a value is an array.

Browser support

Feature Desktop Mobile
Chrome
Edge
Firefox
Safari
Chrome Android
Safari iOS
javascript.builtins.Array.isArray
4
12
4
5
18
5
1+Supported (version) Not supported ※Has note Sub-feature descriptions sourced from MDN Web Docs (CC BY-SA 2.5)

Syntax

JAVASCRIPT 
Array.isArray([1, 2, 3]);     // true
Array.isArray('string');       // false
Array.isArray({ length: 3 }); // false
Array.isArray(new Array());    // true

Live demo

Array or or. check

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PreviewFullscreen

Array styleobject and. comparison

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PreviewFullscreen

practical typecheck

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PreviewFullscreen

Use cases

  • Using Array.isArray()

    The Array.isArray() static method checks whether a value is an array.

Cautions

  • No specific concerns. Stable across all major browsers.

Accessibility

  • When updating the DOM dynamically, announce important changes to assistive technology with aria-live regions.

Related links

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