方式一、通过 getCurrentInstance 方法获取当前组件实例，从而获取 route 和 router

<template>
  <div>

  </div>
</template>
<script>
import { defineComponent, getCurrentInstance } from 'vue'

export default defineComponent({
  name: 'About',
  setup(){
    const { proxy } = getCurrentInstance()
    console.log(proxy.$root.$route)
    console.log(proxy.$root.$router)
    return {}
  }
})
</script>

• 方式二：通过从路由中导入 useRoute useRouter 使用 route 和 router。 官方Api

<script lang="ts">
import { defineComponent } from 'vue'
import { useRoute, useRouter } from 'vue-router'
export default defineComponent({
  setup () {
    const $route = useRoute()
    const $router = useRouter()
    console.log($route)
    console.log($router)
  }
})
</script>

• 组件内导航守卫函数。 官方Api

  <template>
    <div id="about">
      <button @click="$router.push('/scroll')">goScroll</button>
    </div>
  </template>
  <script lang="ts">
  import { defineComponent } from 'vue'
  export default defineComponent({
    setup () { /* */ },
    beforeRouteEnter (to, from, next) { // 组件导航守卫---前置守卫
      console.log(to)
      console.log(from)
      next()
    },
    beforeRouteLeave (to, from) { // 组件导航守卫---后置守卫
      console.log(to)
      console.log(from)
    }
  })
  </script>