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Vue.js · Function

onBeforeUnmount

onBeforeUnmount() registers a callback that Vue runs just before a component is unmounted. The component is still fully functional at that time.

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Syntax

function onBeforeUnmount(callback: () => void, target?: ComponentInternalInstance | null): void

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  • onMounted
  • onUnmounted
  • onBeforeUpdate
  • onUpdated

Source: Composition API: Lifecycle Hooks | Vue.js. Checked 2026-11-03.