使用vite2 快速搭建 vue3 项目 （ router + vuex + scss + vant ）_vite vant additionaldata

 

 

---

前言

环境: node 12.18.3,npm 6.14.6 或 yarn 1.22.10

 

一、使用vite创建项目

 npm init @vitejs/app my-first-vite-app --template vue
 或 
 yarn create @vitejs/app my-first-vite-app --template vue
 >cd my-first-vite-app
 >yarn
 >yarn dev

  到这里项目就搭建好了，下面开始配置文件

1. 环境变量

.env.development

NODE_ENV=development
  
VITE_APP_WEB_URL='https://cn.vitejs.dev/'

.env.production

NODE_ENV=production
  
VITE_APP_WEB_URL= 'https://baidu.com'

 

2.定义全局变量

vue2 : Vue.prototype.$http = (name) => `my name is ${name}`

 使用：this.$http();

vue3 : app.config.globalProperties.$http= (name) => `my name is ${name}`

 使用： this.$http();  如果在 setup 函数中，因为this是 undefined,所以需要通过getCurrentInstance函数来使用

3. watchEffect,watch, computed的使用见下图,watchEffect,watch区别在于watchEffect不获取旧值

main.js

import { createApp} from 'vue'
import App from './App.vue'
 
const app = createApp(App)
//配置全局变量
app.config.globalProperties.$http= (name) => `my name is ${name}`
app.mount('#app')

App.vue

<template>
  <HelloWorld :msg="msg" />
  <input type="text" v-model="info"/>
  <p>{{fullName}}</p> 
</template>
 
<script>
import HelloWorld from "./components/HelloWorld.vue"
import {ref,getCurrentInstance，watchEffect,watch,computed} from 'vue'
 export default {
  components:{
    HelloWorld   
  },
  setup() {
    const info = ref("欢迎光临")
    //getCurrentInstance 支持访问内部组件实例,只能在 setup 或生命周期钩子中调用。
    //如需在 setup 或生命周期钩子外使用，请先在 setup 中调用 getCurrentInstance() 
    //获取该实例然后再使用。
    const { proxy } = getCurrentInstance()
   //打印全局变量
    console.log(proxy.$http('joy'))
    console.log(process.env.NODE_ENV) // console -->    development 
    console.log(import.meta.env.MODE) // console -->    development 
    console.log(import.meta.env.VITE_APP_WEB_URL) // console -->  https://cn.vitejs.dev/ 
    // watchEffect
    watchEffect(() => {console.log(info.value)})
    //watch
    watch(info,(newval,oldval) =>{
      console.log(`我是旧值${oldval},我是新值${newval}`)
    })
    //computed
    const fullName = computed(() => `${info.value}美丽屋`)
 
    const msg = ref('Hello Vue 3 + Vite')
 
    return {msg,info,fullName }
  },
}
</script>
 
<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
</style>

vite.config.js

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import { resolve } from 'path';
 
export default defineConfig({
  plugins: [vue()],
  resolve: {
    alias: {
      '@': resolve(__dirname, "src") //设置别名
    }
  },
  base: './',
  server: {
    host: 'localhost',
    port: 8086,
    open: true,
  },
})

二、引入router

NPM

npm install vue-router@4  --save

Yarn

yarn add vue-router@4 --save

main.js

import { createApp} from 'vue'
import App from './App.vue'
import router from '@/router'
 
const app = createApp(App)
app.config.globalProperties.$http = (name) => `my name is ${name}`
app.use(router)
app.mount('#app')

在src下新建文件夹 router，在router下建立文件

index.js

import {createRouter,createWebHistory} from 'vue-router';
import routes from './routes'
 
const router = createRouter({
    history:createWebHistory("/viteApp/"), //history模式使用HTML5模式
    routes,
});
 
export default router;

 routes.js

export default [
  {
      path: '/',
      name: 'home',
      component: () => import('@/views/home.vue'), //路由懒加载
  },
  {
    path: '/wxc',
    name: 'wxc',
    component: () => import('@/views/wxc.vue'), //路由懒加载
},
];

home.vue

<template>
  <div>{{msg}}</div>
  <div @click="gotoStore()">{{todo}}</div>
</template>
 
<script>
import {ref,getCurrentInstance} from 'vue'
import {onBeforeRouteLeave,useRouter} from 'vue-router';
export default {
 setup(){
   const todo = ref('去万象城')
   const msg = ref('我是home页')
   const router = useRouter()
 
   const gotoStore = () => { router.push({name: 'wxc'})}
 
   //const { proxy } = getCurrentInstance(); 
   //const gotoStore = () => proxy.$router.push({ name: "wxc" });
   
   onBeforeRouteLeave(() =>{
      console.log('我离开了home')
    })
   return {msg,todo,gotoStore}
 }
}
</script>
<style scoped>
</style>

三、引入vuex

NPM

npm install vuex@next --save

Yarn

yarn add vuex@next --save

main.js

import { createApp } from 'vue'
import App from './App.vue'
import router from '@/router'
import { store } from '@/store'
 
const app = createApp(App)
app.config.globalProperties.$http = name => `my name is ${name}`
app.use(router).use(store).mount('#app')

在src下新建文件夹 store，在store下建立文件

index.js

import {createStore} from 'vuex'
import {mutations} from './mutations'
import {actions} from './actions'
 
export const store = createStore({
    state:{
         typeId: 'user001',
         showName: true,
         count: 0,
         user:{
            name: 'joy',
            pwd: '123456'
         }
    },
    getters:{
        getId(state){
            return state.typeId
        },
        getUser(state){
            return state.user
        }
 
    },
    mutations,
    actions
})

mutations.js

export const mutations = {
    showUserName(state){
        state.showName = false
    },
    updateCount(state){
        state.count++
    }
}

actions.js

export const actions = {
    getUserList({commit}){
        commit('updateCount')
    }
}

home.vue

<template>
  <div>{{msg}}</div>
  <div @click="gotoStore()">{{todo}}</div>
</template>
 
<script>
import {ref} from 'vue'
import {onBeforeRouteLeave,useRouter} from 'vue-router';
import {useStore} from 'vuex'
export default {
 setup(){
   const todo = ref('去万象城')
   const msg = ref('我是home页')
   const router = useRouter()
   console.log(router)
   
   const gotoStore = () => { router.push({name: 'wxc'})}
   onBeforeRouteLeave(() =>{
      console.log('我离开了home')
    })
    const store = useStore();
    console.log(store)
    store.commit('showUserName')
    store.dispatch('getUserList')
    console.log(store.state.showName)
    console.log(store.state.count)
 
   return {msg,todo,gotoStore}
 }
}
</script>
<style scoped>
</style>

四、引入 scss

NPM

npm  install sass -D

Yarn 

yarn add sass -D

vite.config.js

import {defineConfig} from 'vite'
import vue from '@vitejs/plugin-vue'
import styleImport from 'vite-plugin-style-import'
import { resolve } from 'path';
 
export default defineConfig({
  plugins: [vue()],
  resolve: {
    alias: {
      '@': resolve(__dirname, "src")
    }
  },
  base: './',
  server: {
    host: '10.0.13.63',
    port: 8086,
    open: true,
  },
  css:{
    preprocessorOptions: {
      scss: {
        additionalData: `@import "./src/assets/common/common.scss";`//引用公共样式，使用vite搭建项目只安装sass即可，不需要安装node-sass,sass-loader
      }
    }
  }
});
 

五、引入vant 

NPM 

npm i vant@next -S

Yarn

yarn add vant@next -S

配置按需引入，需要先安装插件，可以使用 vite-plugin-style-import 或 vite-plugin-imp 实现按需引入，本文使用 vite-plugin-style-import 

npm i vite-plugin-style-import -D

yarn add vite-plugin-style-import -D

vite.config.js

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import { resolve } from 'path';
import styleImport from 'vite-plugin-style-import'
 
export default defineConfig({
  plugins: [vue(),
    styleImport({
      libs: [{
        libraryName: 'vant',
        esModule: true,
        resolveStyle: (name) => {
          return `vant/es/${name}/style/index`;
        }
      }]
    })
  ],
  resolve: {
    alias: {
      '@': resolve(__dirname, "src") //设置别名
    }
  },
  base: './',
  server: {
    host: 'localhost',
    port: 8086,
    open: true,
  },
  css:{
    preprocessorOptions: {
      scss: {
        additionalData: `@import "./src/assets/common/common.scss";`//引用公共样式，使用vite搭建项目只安装sass即可，不需要安装node-sass,sass-loader
      }
    }
  }
})

main.js

import { createApp } from 'vue'
import App from './App.vue'
import router from '@/router'
import { store } from '@/store'
import { NavBar } from 'vant';
import { Icon } from 'vant';
import { Swipe, SwipeItem } from 'vant';
import { NoticeBar } from 'vant';
import { Card } from 'vant';
const app = createApp(App)
app.config.globalProperties.$http = name => `my name is ${name}`
app.use(router).use(store).use(Icon).use(NavBar).use(Swipe).use(SwipeItem).use(NoticeBar).use(Card).mount('#app')

wxc.vue

<template>
  <div class="main-box">
    <van-nav-bar
      title="万象城"
      left-text="返回"
      right-text="反馈"
      left-arrow
      @click-left="onClickLeft"
      @click-right="onClickRight"
    />
    <van-notice-bar
      left-icon="volume-o"
      text="在代码阅读过程中人们说脏话的频率是衡量代码质量的唯一标准。"
    />
    <van-swipe
      class="my-swipe"
      :autoplay="3000"
      lazy-render
      :height="240"
      @change="onChange"
    >
      <van-swipe-item v-for="image in images" :key="image">
        <img :src="image" />
      </van-swipe-item>
      <template #indicator>
        <div class="custom-indicator">
          {{ current + 1 }}/{{ images.length }}
        </div>
      </template>
    </van-swipe>
    <van-card
      v-for="i in 3"
      :key="i"
      num="2"
      price="2.00"
      desc="描述信息"
      title="商品标题"
      thumb="https://img.yzcdn.cn/vant/ipad.jpeg"
    />
  </div>
</template>
 
<script>
import { ref, reactive } from "vue"
import { useRouter } from "vue-router"
export default {
  props: ["name"],
  setup(props) {
    console.log(props)
 
    const router = useRouter()
    const onClickLeft = () => router.push({ name: "home" })
    const onClickRight = () => ""
    const images = [
      "https://img.yzcdn.cn/vant/apple-1.jpg",
      "https://img.yzcdn.cn/vant/apple-2.jpg",
    ]
    const current   = ref(0)
    const onChange = (index) => {
      current.value = index
    }
    return { onClickLeft, onClickRight, images, current, onChange }
  },
  created() {
    console.log("config", this.$http("lily"))
  },
}
</script>
<style lang="scss" scoped>
.main-box {
  width: 100vw;
  height: 100vh;
}
img {
  width: 100vw;
  height: 240px;
}
.custom-indicator {
  position: absolute;
  right: 5px;
  bottom: 5px;
  padding: 2px 5px;
  font-size: 12px;
  background: rgba(0, 0, 0, 0.1);
}
.my-swipe .van-swipe-item {
  padding-top: 1px;
}
</style>

完工

---

总结

    搭建过程中错用了vite1中的一些设置，导致浪费了好多脑细胞，总之要认真看官方文档，别搞错版本就行，vite 速度真的很快，后续现在小的生产项目上试试手。