is

Namespace for unit validators

is.store(value)

Checks if given value is store

Returns

boolean

import {
is,
createStore,
createEvent,
createEffect,
createDomain,
} from 'effector'
const store = createStore(null)
const event = createEvent()
const fx = createEffect()
is.store(store)
// => true
is.store(event)
// => false
is.store(fx)
// => false
is.store(createDomain())
// => false
is.store(fx.pending)
// => true
is.store(fx.done)
// => false
is.store(store.updates)
// => false
is.store(null)
// => false

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is.event(value)

Checks if given value is event

Returns

boolean

import {
is,
createStore,
createEvent,
createEffect,
createDomain,
} from 'effector'
const store = createStore(null)
const event = createEvent()
const fx = createEffect()
is.event(store)
// => false
is.event(event)
// => true
is.event(fx)
// => false
is.event(createDomain())
// => false
is.event(fx.pending)
// => false
is.event(fx.done)
// => true
is.event(store.updates)
// => true
is.event(null)
// => false

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is.effect(value)

Checks if given value is effect

Returns

boolean

import {
is,
createStore,
createEvent,
createEffect,
createDomain,
} from 'effector'
const store = createStore(null)
const event = createEvent()
const fx = createEffect()
is.effect(store)
// => false
is.effect(event)
// => false
is.effect(fx)
// => true
is.effect(createDomain())
// => false
is.effect(null)
// => false

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is.domain(value)

Checks if given value is domain

Returns

boolean

import {
is,
createStore,
createEvent,
createEffect,
createDomain,
} from 'effector'
const store = createStore(null)
const event = createEvent()
const fx = createEffect()
is.domain(store)
// => false
is.domain(event)
// => false
is.domain(fx)
// => false
is.domain(createDomain())
// => true
is.domain(null)
// => false

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is.unit(value)

Checks if given value is unit: store, event, effect or domain

Returns

boolean

import {
is,
createStore,
createEvent,
createEffect,
createDomain,
} from 'effector'
const store = createStore(null)
const event = createEvent()
const fx = createEffect()
is.unit(store)
// => true
is.unit(event)
// => true
is.unit(fx)
// => true
is.unit(createDomain())
// => true
is.unit(fx.pending)
// => true
is.unit(fx.done)
// => true
is.unit(store.updates)
// => true
is.unit(null)
// => false

Try it

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