34 lines
1005 B
Markdown
34 lines
1005 B
Markdown
---
|
|
title: Array isArray
|
|
---
|
|
The `Array.isArray()` method returns `true` if an object is an array, `false` if it is not.
|
|
|
|
## Syntax
|
|
|
|
Array.isArray(obj)
|
|
|
|
### Parameters
|
|
|
|
**obj** The object to be checked.
|
|
|
|
<a href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray' target='_blank' rel='nofollow'>MDN link</a> | <a href='https://msdn.microsoft.com/en-us/LIBRary/ff848265%28v=vs.94%29.aspx' target='_blank' rel='nofollow'>MSDN link</a>
|
|
|
|
## Examples
|
|
|
|
// all following calls return true
|
|
Array.isArray([]);
|
|
Array.isArray([1]);
|
|
Array.isArray(new Array());
|
|
// Little known fact: Array.prototype itself is an array:
|
|
Array.isArray(Array.prototype);
|
|
|
|
// all following calls return false
|
|
Array.isArray();
|
|
Array.isArray({});
|
|
Array.isArray(null);
|
|
Array.isArray(undefined);
|
|
Array.isArray(17);
|
|
Array.isArray('Array');
|
|
Array.isArray(true);
|
|
Array.isArray(false);
|
|
Array.isArray({ __proto__: Array.prototype }); |