Uniapp Vue3 基础知识点附带实例

<template>
  <div>
    <!-- 条件渲染 -->
    <div v-if="showMessage">Hello, {{ name }}</div>
    <div v-else>Welcome!</div>
    <!-- 列表渲染 -->
    <ul>
      <li v-for="(item, index) in items" :key="index">{{ item }}</li>
    </ul>
    <!-- 表单输入处理 -->
    <input v-model="message" placeholder="Enter your message" />
    <button @click="handleClick">Submit</button>
    <!-- 自定义指令和过滤器 -->
    <p v-custom-directive="'highlight'">This is a highlighted text.</p>
    <p>{{ message | customFilter }}</p>
    <!-- 路由和导航 -->
    <router-link to="/about">About</router-link>
    <router-view></router-view>
    <!-- 状态管理（Vuex） -->
    <store-component></store-component>
  </div>
</template>
<script setup>
import { ref, computed } from 'vue';
import { useRouter } from 'vue-router';
import { useStore } from 'vuex';
// 数据绑定和计算属性
const name = ref('John Doe');
const showMessage = computed(() => name.value !== '');
// 事件处理
function handleClick() {
  console.log('Button clicked:', message.value);
}
// 路由和导航
const router = useRouter();
const navigateToAbout = () => {
  router.push('/about');
};
// 状态管理（Vuex）
const store = useStore();
const getCount = () => store.state.count;
const incrementCount = () => store.dispatch('increment');