VueUse

syncRef

Keep target refs in sync with a source ref

Usage 

import { syncRef } from '@vueuse/core'

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

const stop = syncRef(source, target)

console.log(target.value) // hello

source.value = 'foo'

console.log(target.value) // foo

Watch options

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

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
}

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

import { syncRef } from '@vueuse/core'

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

syncRef(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!
  • biSyncRef

Type Declarations 

export interface SyncRefOptions 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 syncRef<R extends Ref<any>>(
  source: R,
  targets: R | R[],
  { flush, deep, immediate }?: SyncRefOptions
): WatchStopHandle

Source

Source • Demo • Docs