or

import { or } from 'patronum';
// or
import { or } from 'patronum/or';

Motivation

The method allows to check each passed store for truthy values. It can be compared with if (a || b || c || d).

Formulae

$result = or(...stores);

$result store contains true if at least one of passed store contains “truthy” value.

Arguments

The method receives any amount of arguments.

...stores: Array<Store<T>> — Each argument must be store with a value of any kind.

Returns

$result: Store<boolean> — The store contains false if each passed store in stores contains “falsey” value

Example

const $isAuthorized = createStore(true);
const $immediateOrder = createStore(false);
const $mocksForDemo = createStore(false);

const $allowedToShow = or($isAuthorized, $immediateOrder, $mocksForDemo);
console.assert(true === $allowedToShow.getState());

Try it

Alternative

import { combine, createSTore } from 'effector';

const $isAuthorized = createStore(true);
const $immediateOrder = createStore(false);
const $mocksForDemo = createStore(false);

const $allowedToShow = combine(
  $isAuthorized,
  $immediateOrder,
  $mocksForDemo,
  (isAuthorized, immediateOrder, mocksForDemo) =>
    isAuthorized || immediateOrder || mocksForDemo,
);
console.assert(true === $allowedToShow.getState());