useMutationObserver

类别

Elements

导出体积

613 B

上次更改

2 minutes ago

监视对 DOM 树的变更。MutationObserver MDN

示例

源码

用法

import { useMutationObserver } from '@vueuse/core'
import { ref } from 'vue'

export default {
  setup() {
    const el = ref(null)
    const messages = ref([])

    useMutationObserver(el, (mutations) => {
      if (mutations[0])
        messages.value.push(mutations[0].attributeName)
    }, {
      attributes: true,
    })

    return {
      el,
      messages,
    }
  },
}

类型声明

typescript

export interface UseMutationObserverOptions
  extends MutationObserverInit,
    ConfigurableWindow {}
/**
 * 监视对 DOM 树的变更
 *
 * @see https://vueuse.org/useMutationObserver
 * @see https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver MutationObserver MDN
 * @param target
 * @param callback
 * @param options
 */
export declare function useMutationObserver(
  target:
    | MaybeComputedElementRef
    | MaybeComputedElementRef[]
    | MaybeRefOrGetter<MaybeElement[]>,
  callback: MutationCallback,
  options?: UseMutationObserverOptions,
): {
  isSupported: ComputedRef<boolean>
  stop: () => void
  takeRecords: () => MutationRecord[] | undefined
}
export type UseMutationObserverReturn = ReturnType<typeof useMutationObserver>