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syncRefs ​

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Export Size
158 B
Last Changed
2 years ago
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Keep target refs in sync with a source ref

Demo ​

Usage ​

ts
import { syncRefs } from '@vueuse/core'

const source = ref('hello')
const target = ref('target')

const stop = syncRefs(source, target)

console.log(target.value) // hello

source.value = 'foo'

console.log(target.value) // foo

Sync with multiple targets ​

You can also pass an array of refs to sync.

ts
import { syncRefs } from '@vueuse/core'

const source = ref('hello')
const target1 = ref('target1')
const target2 = ref('target2')

const stop = syncRefs(source, [target1, target2])

console.log(target1.value) // hello
console.log(target2.value) // hello

source.value = 'foo'

console.log(target1.value) // foo
console.log(target2.value) // foo

Watch options ​

The options for syncRefs are similar to watch's WatchOptions but with different default values.

ts
export interface SyncRefOptions {
  /**
   * Timing for syncing, same as watch's flush option
   *
   * @default 'sync'
   */
  flush?: WatchOptions['flush']
  /**
   * Watch deeply
   *
   * @default false
   */
  deep?: boolean
  /**
   * Sync values immediately
   *
   * @default true
   */
  immediate?: boolean
}
js
export {}

When setting { flush: 'pre' }, the target reference will be updated at the end of the current "tick" before rendering starts.

ts
import { syncRefs } from '@vueuse/core'

const source = ref('hello')
const target = ref('target')

syncRefs(source, target, { flush: 'pre' })

console.log(target.value) // hello

source.value = 'foo'

console.log(target.value) // hello <- still unchanged, because of flush 'pre'

await nextTick()

console.log(target.value) // foo <- changed!

Type Declarations ​

typescript
export interface SyncRefsOptions extends ConfigurableFlushSync {
  /**
   * Watch deeply
   *
   * @default false
   */
  deep?: boolean
  /**
   * Sync values immediately
   *
   * @default true
   */
  immediate?: boolean
}
/**
 * Keep target ref(s) in sync with the source ref
 *
 * @param source source ref
 * @param targets
 */
export declare function syncRefs<T>(
  source: WatchSource<T>,
  targets: Ref<T> | Ref<T>[],
  options?: SyncRefsOptions,
): WatchStopHandle

Source ​

Source • Demo • Docs

Contributors ​

Anthony Fu
Nozomu Ikuta
sun0day
Bruno Perel

Changelog ​

No recent changes

Released under the MIT License.