export function objectOrFunction(x) { let type = typeof x; return x !== null && (type === 'object' || type === 'function'); } export function isFunction(x) { return typeof x === 'function'; } export function isMaybeThenable(x) { return x !== null && typeof x === 'object'; } let _isArray; if (Array.isArray) { _isArray = Array.isArray; } else { _isArray = x => Object.prototype.toString.call(x) === '[object Array]'; } export const isArray = _isArray;