@feugene/mu/src/is/isArrayLike.ts

Helpful TS utilities without dependencies

import isFunction from '~/is/isFunction'
import isLength from '~/is/isLength'

/**
 * Checks if `value` is array-like. A value is considered array-like if it's
 * not a function and has a `value.length` that's an integer greater than or
 * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
 *
 * @example
 *
 * isArrayLike([1, 2, 3]);
 * // => true
 *
 * isArrayLike(document.body.children);
 * // => true
 *
 * isArrayLike('abc');
 * // => true
 *
 * isArrayLike(()=>{}));
 * // => false
 */
export default function isArrayLike(value: any): boolean {
  return value != null && isLength(value.length) && !isFunction(value)
}