Thu May 18 12:12:00 UTC 2023 inscode

src/App.vue

-<script setup>
-import HelloWorld from './components/HelloWorld.vue'
-import TheWelcome from './components/TheWelcome.vue'
-</script>
-
 <template>
-  <header>
-    <img alt="Vue logo" class="logo" src="./assets/logo.svg" width="125" height="125" />
-
-    <div class="wrapper">
-      <HelloWorld msg="You did it!" />
+  <div>
+    <button @click="add">Increment</button>
+    <div>
+      {{ count }}
+    </div>
+   <HelloWorld></HelloWorld>
   </div>
-  </header>
-
-  <main>
-    <TheWelcome />
-  </main>
 </template>
+<script>
+import HelloWorld from './components/HelloWorld.vue';
 
-<style scoped>
-header {
-  line-height: 1.5;
-}
 
-.logo {
-  display: block;
-  margin: 0 auto 2rem;
-}
 
-@media (min-width: 1024px) {
-  header {
-    display: flex;
-    place-items: center;
-    padding-right: calc(var(--section-gap) / 2);
-  }
-
-  .logo {
-    margin: 0 2rem 0 0;
-  }
-
-  header .wrapper {
-    display: flex;
-    place-items: flex-start;
-    flex-wrap: wrap;
+export default{
+    data() {
+        return {
+            count: 0
+        };
+    },
+    methods: {
+        add() {
+            this.count++;
         }
+    },
+    mounted() {
+        console.log(this.count);
+        console.log("vue要开始学习了哦");
+    },
+    components: { HelloWorld }
 }
-</style>
+</script> 
+

src/main.js

 import { createApp } from 'vue'
 import App from './App.vue'
+import HelloWorld from './components/HelloWorld.vue'
 
-import './assets/main.css'
-
-createApp(App).mount('#app')
+let app=createApp(App)
+app.mount('#app')
+app.config.errorHandler=(err)=>{
+    console.log("你是出现了错误");
+}
+app.component('HelloWorld',HelloWorld)
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