vue实现代码

以下是Vue实现常见功能的代码示例，涵盖基础语法、组件通信、状态管理等核心内容：

基础模板语法

<template>
  <div>
    <h1>{{ message }}</h1>
    <button @click="increment">Count: {{ count }}</button>
    <input v-model="inputText" placeholder="Type something">
  </div>
</template>

<script>
export default {
  data() {
    return {
      message: 'Hello Vue!',
      count: 0,
      inputText: ''
    }
  },
  methods: {
    increment() {
      this.count++
    }
  }
}
</script>

组件通信（Props & Emit）

父组件：

<template>
  <ChildComponent 
    :title="parentTitle" 
    @update-title="handleUpdate"
  />
</template>

<script>
import ChildComponent from './ChildComponent.vue'

export default {
  components: { ChildComponent },
  data() {
    return {
      parentTitle: 'Initial Title'
    }
  },
  methods: {
    handleUpdate(newTitle) {
      this.parentTitle = newTitle
    }
  }
}
</script>

子组件：

<template>
  <div>
    <h2>{{ title }}</h2>
    <button @click="changeTitle">Change Title</button>
  </div>
</template>

<script>
export default {
  props: ['title'],
  methods: {
    changeTitle() {
      this.$emit('update-title', 'New Title')
    }
  }
}
</script>

Vuex状态管理

store.js:

import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex)

export default new Vuex.Store({
  state: {
    counter: 0
  },
  mutations: {
    increment(state) {
      state.counter++
    }
  },
  actions: {
    incrementAsync({ commit }) {
      setTimeout(() => {
        commit('increment')
      }, 1000)
    }
  },
  getters: {
    doubleCounter(state) {
      return state.counter * 2
    }
  }
})

组件中使用：

<template>
  <div>
    <p>Count: {{ $store.state.counter }}</p>
    <p>Double: {{ $store.getters.doubleCounter }}</p>
    <button @click="$store.commit('increment')">Increment</button>
    <button @click="$store.dispatch('incrementAsync')">Async Increment</button>
  </div>
</template>

组合式API（Vue 3）

<template>
  <div>
    <h1>{{ title }}</h1>
    <p>Count: {{ count }}</p>
    <button @click="increment">Increment</button>
  </div>
</template>

<script>
import { ref, computed, onMounted } from 'vue'

export default {
  setup() {
    const count = ref(0)
    const title = computed(() => `Count is ${count.value}`)

    function increment() {
      count.value++
    }

    onMounted(() => {
      console.log('Component mounted')
    })

    return {
      count,
      title,
      increment
    }
  }
}
</script>

路由配置

router.js:

import Vue from 'vue'
import Router from 'vue-router'
import Home from './views/Home.vue'
import About from './views/About.vue'

Vue.use(Router)

export default new Router({
  routes: [
    {
      path: '/',
      name: 'home',
      component: Home
    },
    {
      path: '/about',
      name: 'about',
      component: About
    }
  ]
})

导航使用：

<template>
  <div>
    <router-link to="/">Home</router-link>
    <router-link to="/about">About</router-link>
    <router-view></router-view>
  </div>
</template>

这些示例涵盖了Vue开发中的核心概念，可根据实际需求进行组合和扩展。