<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edfe"> <script src="https://unpkg.com/vue@3.3.4/dist/vue.global.js"></script> <title>v-if</title> </head> <body> <div id="app"> <img src="https://v2.cn.vuejs.org/images/logo.svg" alt="" v-show="true"> <img src="https://v2.cn.vuejs.org/images/logo.svg" alt="" v-show="false"> <h2 v-show="isShow">对象形式</h2> <h2 v-if="age<18">未成年</h2> <h2 v-else-if="age<35">还凑合能干</h2> <h2 v-else>没人要了</h2> </div> <script type="text/javascript"> const App = { data() { return { isShow: false, age: 33, } } } Vue.createApp(App).mount("#app") </script> </body> </html>