MpxUsewatchArray
观察添加和删除的数组。
用法
类似于watch，但为回调函数提供添加和删除的元素。如果列表用push、splice等更新到位，则传递｛deep:true｝。
ts
import { watchArray } from '@mpxjs/mpxuse-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 '@mpxjs/mpxuse-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]
})
类型声明
typescript
/**
* Watch for an array with additions and removals.
*
* @see https://mpxuse.cn/watchArray
*/
export declare function watchArray<
T,
Immediate extends Readonly<boolean> = false
>(
source: WatchSource<T[]> | T[],
cb: WatchArrayCallback<T[], Immediate extends true ? T[] | undefined : T[]>,
options?: WatchOptions
): () => void
/**
* Watch for an array with additions and removals.
*
* @see https://mpxuse.cn/watchArray
*/
export declare function watchArray<
T,
Immediate extends Readonly<boolean> = false
>(
source: WatchSource<T[]> | T[],
cb: WatchArrayCallback<T[], Immediate extends true ? T[] | undefined : T[]>,
options?: WatchOptions
): () => void
源码
贡献者
pagnkelly