useLastChanged

分类

状态

导出大小

188 B

上次更改

7 个月前

记录上次更改的时间戳

演示

源代码演练场 (beta)

上次更改：5 分钟前 (1761201859697)

用法

import { useLastChanged
 } from '@vueuse/core'
import { nextTick
 } from 'vue'

const a
 = ref
(0)
const lastChanged
 = useLastChanged
(a
)

a
.value
 = 1

await nextTick
()

console
.log
(lastChanged
.value
) // 1704709379457

默认情况下，更改在下一个 tick 记录（带有 flush: 'post' 的 watch()）。如果您想立即记录更改，请将 flush: 'sync' 作为第二个参数传入。

import { useLastChanged
 } from '@vueuse/core'

const a
 = ref
(0)
const lastChanged
 = useLastChanged
(a
, { flush
: 'sync' })

a
.value
 = 1

console
.log
(lastChanged
.value
) // 1704709379457

类型声明

export interface UseLastChangedOptions
<
  Immediate
 extends boolean,
  InitialValue
 extends number | null | undefined = undefined,
> extends WatchOptions<Immediate
> {
  initialValue
?: InitialValue

}
export type UseLastChangedReturn
 =
  | Readonly
<ShallowRef
<number | null>>
  | Readonly
<ShallowRef
<number>>
/**
 * Records the timestamp of the last change
 *
 * @see https://vueuse.org.cn/useLastChanged
 */
export declare function useLastChanged
(
  source
: WatchSource
,
  options
?: UseLastChangedOptions
<false>,
): Readonly
<ShallowRef
<number | null>>
export declare function useLastChanged
(
  source
: WatchSource
,
  options
: UseLastChangedOptions
<true> | UseLastChangedOptions
<boolean, number>,
): Readonly
<ShallowRef
<number>>