30-seconds-of-code/snippets/isArrayLike.md

title, tags, expertise, firstSeen, lastUpdated

title	tags	expertise	firstSeen	lastUpdated
Value is array-like	type,array	intermediate	2017-12-31T14:53:01+02:00	2020-10-20T23:02:01+03:00

Checks if the provided argument is array-like (i.e. is iterable).

• Check if the provided argument is not null and that its Symbol.iterator property is a function.

const isArrayLike = obj =>
  obj != null && typeof obj[Symbol.iterator] === 'function';

isArrayLike([1, 2, 3]); // true
isArrayLike(document.querySelectorAll('.className')); // true
isArrayLike('abc'); // true
isArrayLike(null); // false