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reactivePick

Category
Export Size
201 B
Last Changed
7 months ago

Reactively pick fields from a reactive object.

Usage

js
import { reactivePick } from '@vueuse/core'

const obj = reactive({
  x: 0,
  y: 0,
  elementX: 0,
  elementY: 0,
})

const picked = reactivePick(obj, 'x', 'elementX') // { x: number, elementX: number }
import { reactivePick } from '@vueuse/core'

const obj = reactive({
  x: 0,
  y: 0,
  elementX: 0,
  elementY: 0,
})

const picked = reactivePick(obj, 'x', 'elementX') // { x: number, elementX: number }

Scenarios

Selectively passing props to child

html
<script setup>
import { reactivePick } from '@vueuse/core'

const props = defineProps({
  value: {
    default: 'value',
  },
  color: {
    type: String,
  },
  font: {
    type: String,
  }
})

const childProps = reactivePick(props, 'color', 'font')
</script>

<template>
  <div>
    <!-- only passes "color" and "font" props to child -->
    <ChildComp v-bind="childProps" />
  </div>
</template>
<script setup>
import { reactivePick } from '@vueuse/core'

const props = defineProps({
  value: {
    default: 'value',
  },
  color: {
    type: String,
  },
  font: {
    type: String,
  }
})

const childProps = reactivePick(props, 'color', 'font')
</script>

<template>
  <div>
    <!-- only passes "color" and "font" props to child -->
    <ChildComp v-bind="childProps" />
  </div>
</template>

Selectively wrap reactive object

Instead of doing this

ts
import { reactive } from 'vue'
import { useElementBounding } from '@vueuse/core'

const { height, width } = useElementBounding() // object of refs
const size = reactive({ height, width })
import { reactive } from 'vue'
import { useElementBounding } from '@vueuse/core'

const { height, width } = useElementBounding() // object of refs
const size = reactive({ height, width })

Now we can just have this

ts
import { reactivePick, useElementBounding } from '@vueuse/core'

const size = reactivePick(useElementBounding(), 'height', 'width')
import { reactivePick, useElementBounding } from '@vueuse/core'

const size = reactivePick(useElementBounding(), 'height', 'width')

Type Declarations

typescript
/**
 * Reactively pick fields from a reactive object
 *
 * @see https://vueuse.org/reactivePick
 */
export declare function reactivePick<T extends object, K extends keyof T>(
  obj: T,
  ...keys: (K | K[])[]
): {
  [S in K]: UnwrapRef<T[S]>
}
/**
 * Reactively pick fields from a reactive object
 *
 * @see https://vueuse.org/reactivePick
 */
export declare function reactivePick<T extends object, K extends keyof T>(
  obj: T,
  ...keys: (K | K[])[]
): {
  [S in K]: UnwrapRef<T[S]>
}

Source

SourceDocs

Contributors

Anthony Fu
丶远方
Brain777777
Alex Kozack

Changelog

v8.8.0 on 7/6/2022
80c16 - fix: allow nested keys
dd94d - fix(types): reactiveOmit and reactivePick support array as second arg (#1742)

Released under the MIT License.