JavaScript .isArray()

The .isArray() method returns true for arrays, otherwise false.

Note: The .isArray() method is called on the Array constructor function and is not a prototype method. That is why .isArray() is called using Array.isArray().

Syntax

Array.isArray(value);

Required parameter value is the value to be checked.

Example

An empty array is passed into the .isArray() method:

console.log(Array.isArray([]));
// Output: true

console.log(Array.isArray(new Array(5)));
// Output: true

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Codebyte Example

In the examples below, the .isArray() method is used to check if values of various types are considered arrays:

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