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watchArray

Category
Export Size
281 B
Last Changed
2 months ago

Watch for an array with additions and removals.

Usage

Similar to watch, but provides the added and removed elements to the callback function. Pass { deep: true } if the list is updated in place with push, splice, etc.

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

const list = ref([1, 2, 3])

watchArray(list, (newList, oldList, added, removed) => {
  console.log(newList) // [1, 2, 3, 4]
  console.log(oldList) // [1, 2, 3]
  console.log(added) // [4]
  console.log(removed) // []
})

onMounted(() => {
  list.value = [...list.value, 4]
})
import { watchArray } from '@vueuse/core'

const list = ref([1, 2, 3])

watchArray(list, (newList, oldList, added, removed) => {
  console.log(newList) // [1, 2, 3, 4]
  console.log(oldList) // [1, 2, 3]
  console.log(added) // [4]
  console.log(removed) // []
})

onMounted(() => {
  list.value = [...list.value, 4]
})

Source

SourceDocs

Contributors

Anthony Fu
sun0day
Di Weng

Changelog

v8.9.0 on 7/6/2022
2ba83 - feat: new function (#1705)

Released under the MIT License.