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963 markdown files reformatted with the repository's pinned prettier so pnpm format:check covers the folded tree like every other repo file. The formatter's embedded-language pass also normalized code fences (TS semicolons, closed HTML tags in examples, lowercased CSS hex colors, one renumbered list that skipped an index). Alphanumeric token deltas vs the fold commit were audited file-by-file; all are formatter-equivalent markup normalizations plus the four sanitized skills.
1.4 KiB
1.4 KiB
category
| category |
|---|
| Elements |
useMutationObserver
Watch for changes being made to the DOM tree. MutationObserver MDN
Usage
<script setup lang="ts">
import { useMutationObserver } from '@vueuse/core';
import { ref, useTemplateRef } from 'vue';
const el = useTemplateRef('el');
const messages = ref([]);
useMutationObserver(
el,
(mutations) => {
if (mutations[0]) messages.value.push(mutations[0].attributeName);
},
{
attributes: true,
},
);
</script>
<template>
<div ref="el">Hello VueUse</div>
</template>
Type Declarations
export interface UseMutationObserverOptions extends MutationObserverInit, ConfigurableWindow {}
/**
* Watch for changes being made to the DOM tree.
*
* @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>;