array-isarray-function-javascript.md

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Array.isArray Function (JavaScript) | Microsoft Docs		01/18/2017	windows-client-threshold			devlang-javascript		language-reference	JavaScript TypeScript DHTML	isArray function [JavaScript] Array.isArray function [JavaScript]	58f7d2e0-d310-4292-b9bc-37a73c585780	8	mikejo5000	mikejo	ghogen

Array.isArray Function (JavaScript)

Determines whether an object is an array.

Syntax

Array.isArray(object)   

Parameters

object
Required. The object to test.

Return Value

true if object is an array; otherwise, false. If the object argument is not an object, false is returned.

Example

The following example illustrates the use of the Array.isArray function.

var ar = [];  
var result = Array.isArray(ar);  
// Output: true  
  
var ar = new Array();  
var result = Array.isArray(ar);  
// Output: true  
  
var ar = [1, 2, 3];  
var result = Array.isArray(ar);  
// Output: true  
  
var result = Array.isArray("an array");  
document.write(result);  
// Output: false  

Requirements

[!INCLUDEjsv9]

See Also

Array Object
Using Arrays
typeof Operator