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Reatom

npm-vue

Reatom integration for Vue Composition API.

Installation

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Terminal window
npm i @reatom/npm-vue

API

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createReatomVue

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A function that creates a Vue App plugin↗ which you can use. Accepts a Ctx object.

import { createCtx } from '@reatom/core'
import { createReatomVue } from '@reatom/npm-vue'


const ctx = createCtx()
app.use(createReatomVue(ctx))

useCtx

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A function to inject a Ctx object provided by createReatomVue. Used by different APIs internally.

reatomRef

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A function that turns a Reatom atom into a Vue ref which is updated on target atom changes. A returned pseudo-ref is mutable if a target atom is mutable itself.

Because all Reatom APIs require ctx to be available, you must either provide it with createReatomVue plugin or pass it explicitly as a second argument to reatomRef.

import { atom } from '@reatom/core'
import { reatomRef } from '@reatom/npm-vue'


const count = atom(0, 'count')


// turn an atom into a ref-like object
const countRef = reatomRef(count)
// selectors are supported as well
const countDoubleRef = reatomRef((ctx) => ctx.spy(count) * 2)


countRef // Ref<number>
countRef.value // 0
countRef.value = 3 // 3


countDoubleRef // Readonly<Ref<number>>
countDoubleRef.value // 6

useAction

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Binds an action or a function to a ctx value.

<script>
import * as model from './model'
import { useAction } from '@reatom/npm-vue'


const doSomething = useAction(model.doSomething)
</script>


<template>
  <BigBrightButton @click="doSomething">Do it!</BigBrightButton>
</template>

If you don’t have a declared action, you can pass a plain function to useAction and give it a name using the second parameter:

const doSomething = useAction((ctx) => {
  doSomethingBad(ctx)
  doSomethingGood(ctx)
}, 'doSomething')

To bind an action to a custom Ctx object, pass it as a field of a config object:

const doSomething = useAction(model.doSomething, { ctx: differentCtx })


const doSomething = useAction(
  (ctx) => {
    doSomethingBad(ctx)
    doSomethingGood(ctx)
  },
  { name: 'doSomething', ctx: differentCtx },
)

useCtxBind

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Creates a function for binding multiple functions to a ctx at any time.

const aAction = action('aAction')
const bAction = action('bAction')
const cAction = action('cAction')


const bind = useCtxBind()
const aFn = bind(aAction)
const bFn = bind(bAction)
const cFn = bind(cAction)

Example

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See the source code↗ or open in StackBlitz↗

Usage

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Setup ctx somewhere in the app root:

import { createCtx } from '@reatom/core'
import { createReatomVue } from '@reatom/npm-vue'


const ctx = createCtx()
app.use(createReatomVue(ctx))

Then use Reatom state in your components: