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                <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例 - 菜鸟教程(runoob.com)</title>
<script src="https://lf3-cdn-tos.bytecdntp.com/cdn/expire-1-M/vue/3.2.31/vue.global.min.js"></script>
</head>
<body>

<div id="app">
  <lifecycle-demo></lifecycle-demo>
</div>

<script>
const LifecycleDemo = {
  template: `<div>{{ message }}</div>`,
  data() {
    return {
      message: 'Hello, Vue!'
    };
  },
  beforeCreate() {
    console.log('beforeCreate: 实例刚刚被创建');
  },
  created() {
    console.log('created: 实例创建完成');
  },
  beforeMount() {
    console.log('beforeMount: 挂载开始之前');
  },
  mounted() {
    console.log('mounted: 实例已挂载');
  },
  beforeUpdate() {
    console.log('beforeUpdate: 数据更新之前');
  },
  updated() {
    console.log('updated: 数据更新完成');
  },
  beforeUnmount() {
    console.log('beforeUnmount: 实例卸载之前');
  },
  unmounted() {
    console.log('unmounted: 实例已卸载');
  }
};

const app = Vue.createApp({
  components: {
    LifecycleDemo
  }
});

app.mount('#app');
</script>

</body>
</html>
              