watchArray

类别

Watch

导出大小

303 B

最近修改

2 days ago

观察有添加和删除的数组。

🌐 Watch for an array with additions and removals.

用法

🌐 Usage

类似于 watch，但会将新增和删除的元素传递给回调函数。如果列表在原地使用 push、splice 等方法更新，则传 { deep: true }。

🌐 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.

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]
})