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

isArrayLike

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(document.querySelectorAll('.className')); // true
isArrayLike('abc'); // true
isArrayLike(null); // false