1.main.ts
2.简单写一个src下的结构
App.vue 根组件
<template><div class="app"><!-- html --><h1>你好啊!</h1></div>
</template><script lang="ts">
//js 或 tsexport default {name:'App',//组件名
};</script><style scoped>
/* css */
.app{background-color: #ddd;box-shadow: 0 0 10px;border-radius: 10px;padding: 20px;
}
</style>main.ts
//引入 createApp用于创建应用
import {createApp} from 'vue';
//引入 App 根组件
import App from './App.vue';createApp(App).mount('#app');3.回顾vue2
<template><div class="person"><h2>姓名:{{ name }}</h2><h2>年龄:{{ age }}</h2><button @click="changeName">修改名字</button><button @click="changeAge">修改年龄</button><button @click="showTel">查看联系方式</button></div>
</template><script lang="ts">
export default {name: "Person",data() {return {name: "张三",age: 18,tel: "123456",};},methods: {changeAge() {this.age = 13;},changeName() {this.name = "zhang-san";},showTel() {alert(this.tel);},},
};
</script><style scoped>
.person {background-color: skyblue;box-shadow: 0 0 10px;border-radius: 10px;padding: 20px;
}
button{margin: 0 5px;
}
</style>证明Vue3 能向下兼容 vue2 的语法
