<script setup lang="ts">
  import { onMounted, onBeforeUnmount, ref } from 'vue'
  import { useRouter } from 'vue-router'

  const router = useRouter()

  const countDown = ref(5)
  let timer: NodeJS.Timeout | null = null

  onMounted(() => {
    timer = setInterval(() => {
      countDown.value--
      if (countDown.value <= 0) {
        clearInterval(Number(timer))
        router.back()
      }
    }, 1000)
  })
  onBeforeUnmount(() => {
    if (timer) {
      clearInterval(Number(timer))
    }
  })
</script>

<template>
  <RouterView />
  <div class="text-center text-dark-400 text-[28px]">{{ countDown }}秒后返回<span class="text-blue-600" @click="router.back()">上一页</span></div>
</template>

<style scoped></style>
