? vue3 全家桶体验

Posted 2020-12-12 guangzan

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了? vue3 全家桶体验相关的知识，希望对你有一定的参考价值。

前置

从创建一个简单浏览器导航首页项目展开，该篇随笔包含以下内容的简单上手：

vite
vue3
vuex4
vue-router next

预览效果有助于理清这些内容，限于篇幅，不容易展开叙述。由于项目逻辑简单，只使用了少量 API，我只是写这个小项目过把手瘾，所以对应标题上手。如果您只是想学习 vue 周边的 API，那么，这篇文章将给您带来有限的知识。

初始化项目

使用 vite 初始化 vue3 项目。什么是 vite？Vite 是一个 Web 构建工具。开发过程中通过浏览器 ES Module 导入为您的代码提供服务，生成环境与 Rollup 捆绑在一起进行打包。

特性：

闪电般快速的冷服务器启
动即时热模块更换（HMR）
真正的按需编译

vite 截至今天支持的功能：

Bare Module Resolving
Hot Module Replacement
TypeScript
CSS / JSON Importing
Asset URL Handling
PostCSS
CSS Modules
CSS Pre-processors
JSX
Web Assembly
Inline Web Workers
Custom Blocks
Config File
HTTPS/2
Dev Server Proxy
Production Build
Modes and Environment Variables

npm init vite-app aweshome
npm install
npm run dev
npm run build

最终生成的目录结构与使用 vue-cli 相似：

│  .npmignore
│  a.txt
│  index.html
│  package.json
├─public
│      favicon.ico
└─src
    │  App.vue
    │  index.css
    │  main.js
    ├─assets
    │      logo.png
    └─components
            HelloWorld.vue

可以在项目根目录下创建 vite.config.js 配置 Vite：

module.exports = {
  // 导入别名
  // 这些条目可以是精确的请求->请求映射*（精确，无通配符语法）
  // 也可以是请求路径-> fs目录映射。 *使用目录映射时
  // 键**必须以斜杠开头和结尾**
  alias: {
    // ‘react‘: ‘@pika/react‘,
    // ‘react-dom‘: ‘@pika/react-dom‘
    // ‘/@foo/‘: path.resolve(__dirname, ‘some-special-dir‘),
  },
  // 配置Dep优化行为
  optimizeDeps: {
    // exclude: [‘dep-a‘, ‘dep-b‘],
  },
  // 转换Vue自定义块的功能。
  vueCustomBlockTransforms: {
    // i18n: src => `export default Comp => { ... }`,
  },
  // 为开发服务器配置自定义代理规则。
  proxy: {
    // proxy: {
    //   ‘/foo‘: ‘http://localhost:4567/foo‘,
    //   ‘/api‘: {
    //     target: ‘http://jsonplaceholder.typicode.com‘,
    //     changeOrigin: true,
    //     rewrite: path => path.replace(/^/api/, ‘‘),
    //   },
    // },
  },
  // ...
}

更多配置可以参考Github。

另外，现在可以使用 vitepress 代替原来的 vuepress 构建文档或博客。

vue-router next

npm i vue-router@next

src/router/index.js

import {createRouter, createWebHistory} from ‘vue-router‘
import Home from ‘../components/home/Home.vue‘
import Cards from ‘../components/cards/Cards.vue‘

const router = createRouter({
  history: createWebHistory(),
  routes: [
    // route -> routes
    {
      path: ‘/‘,
      name: ‘home‘,
      component: Home,
    },
    {
      path: ‘/cards‘,
      name: ‘cards‘,
      component: Cards,
    },
  ],
})

export default router

vue router next 还添加了动态路由，解决规则冲突的问题。做过权限管理应该深有体会。更多配置可以参考 Github。

vuex4

使用与 vuex3 相同的 API。

安装

npm i vuex@next

src/constants 下存放了静态数据，它们都是如下形式：

export const vue = [
  {
    title: ‘vue‘,
    desc: ‘Vue 是用于构建用户界面的渐进式的框架‘,
    link: ‘https://cn.vuejs.org/v2/guide/‘,
    img: import(‘../assets/images/vue.png‘), // require -> import
  },
  {
    title: ‘vue Router‘,
    desc: ‘Vue Router 是 Vue.js 官方的路由管理器。‘,
    link: ‘https://router.vuejs.org/zh/‘,
    img: import(‘../assets/images/vue.png‘),
  },
  // ...
]

src/store/index.js

import {createStore} from ‘vuex‘

import {vue, react, wechat, across, compileBuild} from ‘../constants/docs‘
import {frontEndTools, OfficeTools} from ‘../constants/tools‘
import {tools, docs, community} from ‘../constants/asideData‘
import {blogs} from ‘../constants/community‘

const store = createStore({
  state: {
    asideData: [],
    mainData: [],
  },
  mutations: {
    setAsideData(state, key) {
      const asideActions = {
        ‘2‘: tools,
        ‘3‘: docs,
        ‘4‘: community,
      }
      state.asideData = asideActions[key]
    },
    setMainData(state, menuItemText) {
      const actions = new Map([
        [‘前端工具‘, frontEndTools],
        [‘办公工具‘, OfficeTools],
        [‘vue‘, vue],
        [‘react‘, react],
        [‘微信开发‘, wechat],
        [‘跨端框架‘, across],
        [‘编译构建‘, compileBuild],
        [‘博客‘, blogs],
      ])
      state.mainData = actions.get(menuItemText)
    },
  },
  actions: {},
  modules: {},
})

export default store

main.js

结合上文的 vuex vue-router 可以看出，vue3 核心插件的 api 都做了简化。

import ‘./index.css‘
import {createApp} from ‘vue‘
import store from ‘./store‘
import App from ‘./App.vue‘
import router from ‘./router‘

const app = createApp(App)

app.use(store)
app.use(router)
app.mount(‘#app‘)

sass

npm i sass

package.json > dependencies

{
  "dependencies": {
    "vue": "^3.0.0-beta.15",
    "vue-router": "^4.0.0-alpha.13",
    "vuex": "^4.0.0-beta.2"
  },
  "devDependencies": {
    "@vue/compiler-sfc": "^3.0.0-beta.15",
    "sass": "^1.26.8",
    "vite": "^1.0.0-beta.1"
  }
}

components

这个小项目本质上可以只有一个页面 .vue 构成，我将它拆分，便于阅读。

App.vue

<template>
  <Header />
  <main>
    <router-view></router-view>
  </main>
  <Footer />
</template>

<script>
import Header from ‘./components/Header.vue‘
import Footer from ‘./components/Footer.vue‘

export default {
  name: ‘app‘,
  components: {
    Header,
    Footer,
  },
}
</script>

<style>
main {
  flex: 1;
}
</style>

components/cards/Aside.vue

<template>
  <aside>
    <ul>
      <li :index="item.index" v-for="item in this.$store.state.asideData" :key="item.index" ref="menuItem" @click="handleSelect(item.value)">
        <i class="fas fa-home"></i>
        <span>{{ item.value }}</span>
      </li>
    </ul>
  </aside>
</template>

<script>
import store from ‘../../store‘

export default {
  setup(props, context) {
    return {
      handleSelect(value) {
        store.commit(‘setMainData‘, value)
      },
    }
  },
}
</script>

<style lang="scss">
aside {
  flex: 1;
  background-color: rgb(238, 238, 238);
  height: 100%;
  li {
    display: flex;
    align-items: center;
    height: 56px;
    line-height: 56px;
    font-size: 14px;
    color: #303133;
    padding: 0 1.4rem;
    list-style: none;
    cursor: pointer;
    transition: border-color 0.3s, background-color 0.3s, color 0.3s;
    white-space: nowrap;
    &:hover {
      background-color: rgb(224, 224, 224);
    }
  }
}

@media screen and (max-width: 768px) {
  aside {
    display: none;
    &.active {
      display: block;
    }
  }
}
</style>

components/cards/Cards.vue

<template>
  <div id="card-outer">
    <Aside />
    <section></section>
  </div>
</template>

<script>
import Aside from ‘./Aside.vue‘
import router from ‘../../router‘

export default {
  components: {
    Aside,
  },
}
</script>

<style lang="scss">
#card-outer {
  display: flex;
  align-content: stretch;
  height: 100%;
  & > section {
    flex: 8;
  }
}

.main-card {
  margin: 10px 0;
  cursor: pointer;
  .main-card-content {
    display: flex;
    align-items: center;
    img {
      width: 30px;
      height: 30px;
      margin-right: 10px;
    }
    .main-card-content-info {
      width: 90%;
      h3 {
        font-size: 14px;
      }
      p {
        font-size: 12px;
        color: #888ea2;
        white-space: nowrap;
        text-overflow: ellipsis;
        overflow: hidden;
        width: 100%;
        line-height: 1.8;
      }
    }
    span {
      margin-left: 10px;
      text-decoration: none;
      &:nth-of-type(1) {
        font-size: 18px;
        font-weight: 700;
        color: #ffa502;
        white-space: nowrap;
      }
      &:nth-of-type(2) {
        font-size: 14px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
      }
    }
  }
}
</style>

components/home/Home.vue

<template>
  <section id="search">
    <div class="search-sources" style="margin-bottom: 10px;">
      <span size="mini" type="primary" v-for="(item, index) in source" @click="changeSource(item.name)" :key="index" :style="`background:${item.color};border-color:${item.color}`"
        >{{ item.name }}
      </span>
    </div>
    <div class="searchbox" :class="searchbarStyle.className">
      <input :placeholder="searchbarStyle.placeholder" v-model="searchValue" clearable v-on:keyup.enter="submit" />
      <button @click="submit" slot="append" icon="el-icon-search">
        <i class="fas fa-search"></i>
      </button>
    </div>
  </section>
</template>

<script>
export default {
  data: () => ({
    baseUrl: ‘https://www.baidu.com/s?ie=UTF-8&wd=‘,
    searchValue: ‘‘,
    searchbarStyle: {
      className: ‘baidu‘,
      placeholder: ‘百度一下，你就知道‘,
    },
    source: [
      {
        name: ‘百度‘,
        color: ‘#2932E1‘,
      },
      {
        name: ‘搜狗‘,
        color: ‘#FF6F17‘,
      },
      {
        name: ‘Bing‘,
        color: ‘#0c8484‘,
      },
      {
        name: ‘Google‘,
        color: ‘#4285F4‘,
      },
      {
        name: ‘NPM‘,
        color: ‘#EA4335‘,
      },
    ],
  }),
  methods: {  // 可以在 vue3 中使用 options API
    changeSource(name) {
      const actions = new Map([
        [
          ‘百度‘,
          () => {
            this.baseUrl = ‘https://www.baidu.com/s?ie=UTF-8&wd=‘
            this.searchbarStyle = {
              className: ‘baidu‘,
              placeholder: ‘百度一下，你就知道‘,
            }
          },
        ],
        [
          ‘Bing‘,
          () => {
            this.baseUrl = ‘https://cn.bing.com/search?FORM=BESBTB&q=‘
            this.searchbarStyle = {
              className: ‘bing‘,
              placeholder: ‘必应搜索‘,
            }
          },
        ],
        [
          ‘搜狗‘,
          () => {
            this.baseUrl = ‘https://www.sogou.com/web?query=‘
            this.searchbarStyle = {
              className: ‘sougou‘,
              placeholder: ‘搜狗搜索‘,
            }
          },
        ],
        [
          ‘Google‘,
          () => {
            this.baseUrl = ‘https://www.google.com/search?q=‘
            this.searchbarStyle = {
              className: ‘google‘,
              placeholder: ‘Google Search‘,
            }
          },
        ],
        [
          ‘NPM‘,
          () => {
            this.baseUrl = ‘https://www.npmjs.com/search?q=‘
            this.searchbarStyle = {
              className: ‘npm‘,
              placeholder: ‘Search Packages‘,
            }
          },
        ],
      ])
      actions.get(name)()
    },
    submit() {
      const url = this.baseUrl + this.searchValue
      window.open(url)
    },
  },
}
</script>

<style lang="scss">
#search {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-content: stretch;
  margin: 0 auto;
  height: 40vh;
  width: 40%;
  & > div {
    display: flex;
  }
}

.search-sources {
  span {
    margin-right: 0.5rem;
    padding: 0.4rem 0.6rem;
    color: #fff;
    font-size: 14px;
    line-height: 14px;
    border-radius: 2px;
    &:hover {
      filter: contrast(80%);
      transition: 0.3s;
    }
  }
}

.searchbox {
  padding-left: 1rem;
  height: 2.6rem;
  border-radius: 6px;
  background-color: #fff;
  border: 1px #ccc solid;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);

  input {
    flex: 7;
    border: none;
    font-size: 1rem;
  }

  button {
    flex: 1;
    i {
      margin-right: 0;
    }
  }
}

$sources-color: (
  baidu: #2932e1,
  bing: #0c8484,
  sougou: #ff6f17,
  google: #4285f4,
  npm: #ea4335,
);

$source-list: baidu bing sougou google npm;

@each $source in $source-list {
  .#{$source} {
    &:hover {
      border-color: map-get($sources-color, $source);
      box-shadow: 0 2px 4px map-get($sources-color, $source);
      transition: all 0.5s;
    }
    input {
      &:hover {
        border-color: map-get($sources-color, $source);
      }
    }
  }
}

@media screen and (max-width: 768px) {
  #search {
    width: 90%;
  }
}
</style>

components/Header.vue

<template>
  <header>
    <ul class="nav">
      <li @click="handleSelect(‘home‘)">
        <i class="fas fa-home"></i>
        <span>首页</span>
      </li>
      <li @click="handleSelect(‘tools‘)">
        <i class="fas fa-tools"></i>
        <span>工具</span>
      </li>
      <li @click="handleSelect(‘docs‘)">
        <i class="fas fa-file-alt"></i>
        <span>文档</span>
      </li>
      <li @click="handleSelect(‘community‘)">
        <i class="fas fa-comment-dots"></i>
        <span>社区</span>
      </li>
    </ul>
    <MobileMenu />
  </header>
</template>

<script>
import MobileMenu from ‘./MobileMenu.vue‘
import store from ‘../store‘
import router from ‘../router‘

export default {
  components: {
    MobileMenu,
  },

  setup() {
    const handleSelect = item => {
      store.commit(‘setAsideData‘, item)
      if (item === ‘home‘) {
        router.replace({name: ‘home‘})
      } else {
        const actions = {
          tools: [‘setMainData‘, ‘前端工具‘],
          docs: [‘setMainData‘, ‘vue‘],
          community: [‘setMainData‘, ‘博客‘],
        }
        store.commit(actions[item][0], actions[item][1])
        router.replace({name: ‘cards‘})
      }
    }

    return {
      handleSelect,
    }
  },
}
</script>

<style lang="scss">
header {
  display: flex;
  height: 60px;
  align-content: stretch;
  padding: 0 9.5rem;
}

.nav {
  display: flex;
  align-items: center;
  align-content: stretch;
  li {
    padding: 0.5rem 0.75rem;
    &:hover {
      background-color: #f3f1f1;
      & span {
        color: #3273dc;
      }
    }
  }
}

@media screen and (max-width: 768px) {
  header {
    padding: 0;
  }
}
</style>

components/MobileMenu.vue

<template>
  <section id="mobile-menu">
    <div id="navbarBurger" class="navbar-burger burger" data-target="navMenuMore" :class="{active}" @click="sideToggle">
      <span></span>
      <span></span>
      <span></span>
    </div>
  </section>
</template>

<script>
export default {
  data: () => ({
    active: false,
  }),
  methods: {
    sideToggle() {
      this.active = !this.active
      const classList = document.querySelectorAll(‘aside‘)[0].classList
      this.active ? classList.add(‘active‘) : classList.remove(‘active‘)
    },
  },
}
</script>

<style lang="scss">
#mobile-menu {
  display: none;
  position: absolute;
  right: 0;
  top: 0;
  z-index: 999999;
}

@media screen and (max-width: 768px) {
  #mobile-menu {
    display: block;
    .navbar-burger {
      position: relative;
      color: #835656;
      cursor: pointer;
      height: 60px;
      width: 60px;
      margin-left: auto;
      span {
        background-color: #333;
        display: block;
        height: 1px;
        left: calc(50% - 8px);
        position: absolute;
        transform-origin: center;
        transition-duration: 86ms;
        transition-property: background-color, opacity, transform;
        transition-timing-function: ease-out;
        width: 16px;
        &:nth-child(1) {
          top: calc(50% - 6px);
        }
        &:nth-child(2) {
          top: calc(50% - 1px);
        }
        &:nth-child(3) {
          top: calc(50% + 4px);
        }
      }
      &.active {
        span {
          &:nth-child(1) {
            transform: translateY(5px) rotate(45deg);
          }
          &:nth-child(2) {
            opacity: 0;
          }
          &:nth-child(3) {
            transform: translateY(-5px) rotate(-45deg);
          }
        }
      }
    }
  }
}
</style>

最后

一套流程下来，vite 给我的感觉就是“快”。对于 vue 周边， API 都是做了一些简化，如果你对 esm 有些了解，将更有利于组织项目，可读性相比 vue2.x 也更高。也有一些问题，限于篇幅，本文没有探讨。做项目还是上 vue2.x 及其周边。另外，我没找到 vue3 组件库。

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