JS: Array.isArray

By Xah Lee. Date: . Last updated: .

Array.isArray ( value )

Return true if value is a array object. (not a array-like object.) Else, false.

// real array
console.log ( Array.isArray ( ["a", "b"] ) );
// true

// array-like object
console.log ( Array.isArray ( {0:"a", 1:"b" , length:2} ) );
// false

[see JS: Array-Like Object]

Reference

ECMAScript® 2016 Language Specification#sec-array.isarray

JS Array

  1. Understand JS Array
  2. Create Array
  3. Sparse Array
  4. Array-Like Object
  5. Array How-To
  6. Array Object
  7. Array.prototype
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