init

src/App.vue

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+<script setup lang="ts">
+// This starter template is using Vue 3 <script setup> SFCs
+// Check out https://vuejs.org/api/sfc-script-setup.html#script-setup
+import HelloWorld from './components/HelloWorld.vue'
+</script>
+
+<template>
+  <img alt="Vue logo" src="./assets/logo.png" />
+  <HelloWorld msg="Hello Vue 3 + TypeScript + Vite" />
+</template>
+
+<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>

src/components/HelloWorld.vue

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+<script setup lang="ts">
+import { ref } from 'vue'
+
+defineProps<{ msg: string }>()
+
+const count = ref(0)
+</script>
+
+<template>
+  <h1>{{ msg }}</h1>
+
+  <p>
+    Recommended IDE setup:
+    <a href="https://code.visualstudio.com/" target="_blank">VS Code</a>
+    +
+    <a href="https://github.com/johnsoncodehk/volar" target="_blank">Volar</a>
+  </p>
+
+  <p>See <code>README.md</code> for more information.</p>
+
+  <p>
+    <a href="https://vitejs.dev/guide/features.html" target="_blank">
+      Vite Docs
+    </a>
+    |
+    <a href="https://v3.vuejs.org/" target="_blank">Vue 3 Docs</a>
+  </p>
+
+  <button type="button" @click="count++">count is: {{ count }}</button>
+  <p>
+    Edit
+    <code>components/HelloWorld.vue</code> to test hot module replacement.
+  </p>
+</template>
+
+<style scoped>
+a {
+  color: #42b983;
+}
+
+label {
+  margin: 0 0.5em;
+  font-weight: bold;
+}
+
+code {
+  background-color: #eee;
+  padding: 2px 4px;
+  border-radius: 4px;
+  color: #304455;
+}
+</style>

src/env.d.ts

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+/// <reference types="vite/client" />
+
+declare module '*.vue' {
+  import type { DefineComponent } from 'vue'
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any, @typescript-eslint/ban-types
+  const component: DefineComponent<{}, {}, any>
+  export default component
+}

src/main.ts

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+import { createApp } from 'vue'
+import App from './App.vue'
+
+createApp(App).mount('#app')