初识Vue3的setup

20_脚手架/vue3_test/2.src_初识Vue3的setup/App.vue

@@ -0,0 +1,28 @@
+<template>
+  <h1>个人信息：</h1>
+  <h2>姓名：{{name}}</h2>
+  <h2>年龄：{{age}}</h2>
+  <button @click="sayHello">点击</button>
+</template>
+
+<script>
+export default {
+  name: 'App',
+  setup() {
+    // 数据
+    let name = '张三'
+    let age = 19
+
+    // 方法
+    function sayHello() {
+      alert(`名字：${name}，年龄：${age}`)
+    }
+
+    return {
+      name,
+      age,
+      sayHello,
+    }
+  }
+}
+</script>

20_脚手架/vue3_test/2.src_初识Vue3的setup/main.js

@@ -0,0 +1,10 @@
+// 引入的不再是Vue构造函数， 引入的是一个名为createApp的工厂函数
+import { createApp } from 'vue'
+import App from './App.vue'
+
+// createApp(App).mount('#app')
+
+// 创建应用实例对象
+const app = createApp(App)
+console.log('@@@',app)
+app.mount('#app')

20_脚手架/vue3_test/src/App.vue

@@ -1,26 +1,28 @@
 <template>
-  <img alt="Vue logo" src="./assets/logo.png">
-  <HelloWorld msg="Welcome to Your Vue.js App"/>
+  <h1>个人信息：</h1>
+  <h2>姓名：{{name}}</h2>
+  <h2>年龄：{{age}}</h2>
+  <button @click="sayHello">点击</button>
 </template>
 
 <script>
-import HelloWorld from './components/HelloWorld.vue'
-
 export default {
   name: 'App',
-  components: {
-    HelloWorld
+  setup() {
+    // 数据
+    let name = '张三'
+    let age = 19
+
+    // 方法
+    function sayHello() {
+      alert(`名字：${name}，年龄：${age}`)
+    }
+
+    return {
+      name,
+      age,
+      sayHello,
+    }
   }
 }
 </script>
-
-<style>
-#app {
-  font-family: Avenir, Helvetica, Arial, sans-serif;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-  text-align: center;
-  color: #2c3e50;
-  margin-top: 60px;
-}
-</style>

20_脚手架/vue3_test/src/components/HelloWorld.vue

@@ -1,58 +0,0 @@
-<template>
-  <div class="hello">
-    <h1>{{ msg }}</h1>
-    <p>
-      For a guide and recipes on how to configure / customize this project,<br>
-      check out the
-      <a href="https://cli.vuejs.org" target="_blank" rel="noopener">vue-cli documentation</a>.
-    </p>
-    <h3>Installed CLI Plugins</h3>
-    <ul>
-      <li><a href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-babel" target="_blank" rel="noopener">babel</a></li>
-      <li><a href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-eslint" target="_blank" rel="noopener">eslint</a></li>
-    </ul>
-    <h3>Essential Links</h3>
-    <ul>
-      <li><a href="https://vuejs.org" target="_blank" rel="noopener">Core Docs</a></li>
-      <li><a href="https://forum.vuejs.org" target="_blank" rel="noopener">Forum</a></li>
-      <li><a href="https://chat.vuejs.org" target="_blank" rel="noopener">Community Chat</a></li>
-      <li><a href="https://twitter.com/vuejs" target="_blank" rel="noopener">Twitter</a></li>
-      <li><a href="https://news.vuejs.org" target="_blank" rel="noopener">News</a></li>
-    </ul>
-    <h3>Ecosystem</h3>
-    <ul>
-      <li><a href="https://router.vuejs.org" target="_blank" rel="noopener">vue-router</a></li>
-      <li><a href="https://vuex.vuejs.org" target="_blank" rel="noopener">vuex</a></li>
-      <li><a href="https://github.com/vuejs/vue-devtools#vue-devtools" target="_blank" rel="noopener">vue-devtools</a></li>
-      <li><a href="https://vue-loader.vuejs.org" target="_blank" rel="noopener">vue-loader</a></li>
-      <li><a href="https://github.com/vuejs/awesome-vue" target="_blank" rel="noopener">awesome-vue</a></li>
-    </ul>
-  </div>
-</template>
-
-<script>
-export default {
-  name: 'HelloWorld',
-  props: {
-    msg: String
-  }
-}
-</script>
-
-<!-- Add "scoped" attribute to limit CSS to this component only -->
-<style scoped>
-h3 {
-  margin: 40px 0 0;
-}
-ul {
-  list-style-type: none;
-  padding: 0;
-}
-li {
-  display: inline-block;
-  margin: 0 10px;
-}
-a {
-  color: #42b983;
-}
-</style>