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refDebounced

packages/shared/refDebounced/index.md

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refDebounced

Debounce execution of a ref value.

Usage

ts
import { refDebounced } from '@vueuse/core'
import { shallowRef } from 'vue'

const input = shallowRef('foo')
const debounced = refDebounced(input, 1000)

input.value = 'bar'
console.log(debounced.value) // 'foo'

await sleep(1100)

console.log(debounced.value) // 'bar'
// ---cut-after---
function sleep(ms: number) {
  return new Promise(resolve => setTimeout(resolve, ms))
}

An example with object ref.

js
import { refDebounced } from '@vueuse/core'
import { shallowRef } from 'vue'

const data = shallowRef({
  name: 'foo',
  age: 18,
})
const debounced = refDebounced(data, 1000)

function update() {
  data.value = {
    ...data.value,
    name: 'bar',
  }
}

console.log(debounced.value) // { name: 'foo', age: 18 }
update()
await sleep(1100)

console.log(debounced.value) // { name: 'bar', age: 18 }

You can also pass an optional 3rd parameter including maxWait option. See useDebounceFn for details.