@platform/state/lib/common/is.mjs

A small, simple, strongly typed, [rx/observable] state-machine.

export const is = {
    observable: (input) => hasAll(input, 'subscribe'),
    stateObject: (input) => hasAll(input, 'change'),
};
const hasAll = (input, ...keys) => {
    return (input !== null &&
        typeof input === 'object' &&
        keys.every((key) => typeof input[key] === 'function'));
};