Nuxt/docs/content/3.api/1.composables/on-before-route-leave.md

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onBeforeRouteLeave The onBeforeRouteLeave composable allows registering a route guard within a component.

onBeforeRouteLeave

The onBeforeRouteLeave composable adds a navigation guard that triggers whenever the component for the current location is about to be left.

::ReadMore{link="https://router.vuejs.org/api/index.html#onbeforerouteleave"} ::