# JSTotD: How does Array.isArray know?

**URL:** <https://forum.kirupa.com/t/jstotd-how-does-array-isarray-know/642089>\
**Category:** web dev\
**Created:** [March 13, 2020, 6:55pm UTC](https://forum.kirupa.com/t/jstotd-how-does-array-isarray-know/642089 "2020-03-13T18:55:55Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![TheCanadian](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@TheCanadian](https://forum.kirupa.com/u/TheCanadian)\
**Post date:** [March 13, 2020, 6:55pm UTC](https://forum.kirupa.com/t/jstotd-how-does-array-isarray-know/642089/1 "2020-03-13T18:55:55Z")

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Re: [Is it an Array?](http://forum.kirupa.com/t/javascript-tip-of-the-day/641803/34)

How does Array.isArray know when an array is an array?

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**Author:** ![senocular](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/senocular/32/7217_2.png) [@senocular](https://forum.kirupa.com/u/senocular)\
**Post date:** [June 8, 2020, 11:15pm UTC](https://forum.kirupa.com/t/jstotd-how-does-array-isarray-know/642089/2 "2020-06-08T23:15:37Z")

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6 posts were merged into an existing topic: [JS Tip of the Day: Is it an Array?](https://forum.kirupa.com/t/js-tip-of-the-day-is-it-an-array/643155)

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**Author:** ![senocular](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/senocular/32/7217_2.png) [@senocular](https://forum.kirupa.com/u/senocular)\
**Post date:** [June 8, 2020, 11:15pm UTC](https://forum.kirupa.com/t/jstotd-how-does-array-isarray-know/642089/3 "2020-06-08T23:15:37Z")

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