<template> <button @click="isShowDemo = !isShowDemo">切换隐藏/显示</button> <Demo v-if="isShowDemo"/> <hr> <Test/> </template> <script> import {ref} from 'vue' import Demo from './components/Demo' import Test from './components/Test' export default { name: 'App', components:{Demo,Test}, setup() { let isShowDemo = ref(true) return {isShowDemo} } } </script>