vue3在setup函数中没有this指向所以就用useRouter 和useRoute

<script setup lang="ts">
import * as {useRouter,useRoute}from 'vue-router';

const router =useRouter()
const route = useRoute()
const getBack = ()=>{
router.go(-1)
router.push({
name:"about",
query:{
...route.query
}
})
}
</script>