vuecli3 vant rem 移動端框架方案

時間 2019-12-04

標籤 vuecli3 vuecli vant rem 移動框架方案欄目無線简体版

原文原文鏈接

描述

基於vue-cli3.0+webpack 4+vant ui + sass+ rem適配方案+axios封裝，構建手機端模板腳手架css

幫你作好的配置有html

vuecli3.0
多環境開發
axios封裝
rem適配方案
生產環境cdn優化首屏加速
babel低版本瀏覽器兼容
環境發佈腳本

...
能夠上手直接寫代碼vue

多環境開發

以前寫過一個多環境的方案，是基於vue-cli2.0的vue多環境配置方案-傳送門
最近新的項目採用了vuecli3.0開始了一番折騰node

這裏參考了 vue-admin-template基本思路不變
在src的文件裏新建config 根據不一樣的環境去引用不一樣的配置文件，不一樣的是在根目錄下有三個設置環境變量的文件
這裏能夠參考vue-admin-templatewebpack

這裏要注意的是，要以VUE_APP_前綴設置，才能夠在vue中引用
ios

這裏有個問題，既然這裏有了根據不一樣環境設置變量的文件，爲何還要去config下新建三個對應的文件呢？
我的比較喜歡這種引入的方式而，好比我須要在文件引入api.common_apigit

import { api } from '@/config'
// api
const { common_api } = api

rem適配方案

仍是那句話，用vw仍是用rem，這是個問題？github

選用rem的緣由是由於vant直接給到了這個適配方案，我的也比較喜歡這個方案web

================2019.06.06 更新===========================ajax

生產環境使用CDN

可使用cdn提升速度，這裏要在vue.config.js須要配置externals,修改public 下的index.html

vue.config.js

'use strict'
const path = require('path')
const defaultSettings = require('./src/config/index.js')
function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'vue mobile template' // page title
const port = 9018 // dev port
const externals = {
  vue: 'Vue',
  'vue-router': 'VueRouter',
  vuex: 'Vuex',
  vant: 'vant',
  axios: 'axios',
  'crypto-js': 'CryptoJS'
}
// cdn
const cdn = {
  // 開發環境
  dev: {
    css: [],
    js: [
      'https://cdnjs.cloudflare.com/ajax/libs/babel-polyfill/7.4.4/polyfill.js'
    ]
  },
  // 生產環境
  build: {
    css: ['https://cdn.jsdelivr.net/npm/vant@beta/lib/index.css'],
    js: [
      'https://cdnjs.cloudflare.com/ajax/libs/babel-polyfill/7.4.4/polyfill.js',
      'https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.min.js',
      'https://cdnjs.cloudflare.com/ajax/libs/vue-router/3.0.6/vue-router.min.js',
      'https://cdnjs.cloudflare.com/ajax/libs/axios/0.18.0/axios.min.js',
      'https://cdnjs.cloudflare.com/ajax/libs/vuex/3.1.1/vuex.min.js',
      'https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.9-1/crypto-js.min.js',
      'https://cdn.jsdelivr.net/npm/vant@beta/lib/vant.min.js'
    ]
  }
}
module.exports = {
  publicPath: process.env.NODE_ENV === 'development' ? '/' : '/app/', // 須要區分生產環境和開發環境，否則build會報錯
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,
  devServer: {
    port: port,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    }
  },

  configureWebpack: config => {
    // 爲生產環境修改配置...
    if (process.env.NODE_ENV === 'production') {
      // externals裏的模塊不打包
      Object.assign(config, {
        name: name,
        externals: externals
      })
    }
    // 爲開發環境修改配置...
    if (process.env.NODE_ENV === 'development') {
    }
  },
  chainWebpack(config) {
    config.plugins.delete('preload') // TODO: need test
    config.plugins.delete('prefetch') // TODO: need test
    // alias
    config.resolve.alias
      .set('@', resolve('src'))
      .set('assets', resolve('src/assets'))
      .set('views', resolve('src/views'))
      .set('components', resolve('src/components'))
    /**
     * 添加CDN參數到htmlWebpackPlugin配置中， 詳見public/index.html 修改
     */
    config.plugin('html').tap(args => {
      if (process.env.NODE_ENV === 'production') {
        args[0].cdn = cdn.build
      }
      if (process.env.NODE_ENV === 'development') {
        args[0].cdn = cdn.dev
      }
      return args
    })

    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config
      // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === 'development', config =>
        config.devtool('cheap-source-map')
      )

    config.when(process.env.NODE_ENV !== 'development', config => {
      config
        .plugin('ScriptExtHtmlWebpackPlugin')
        .after('html')
        .use('script-ext-html-webpack-plugin', [
          {
            // `runtime` must same as runtimeChunk name. default is `runtime`
            inline: /runtime\..*\.js$/
          }
        ])
        .end()
      config.optimization.splitChunks({
        chunks: 'all',
        cacheGroups: {
          libs: {
            name: 'chunk-libs',
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: 'initial' // only package third parties that are initially dependent
          },
          // elementUI: {
          //   name: 'chunk-elementUI', // split elementUI into a single package
          //   priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
          //   test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
          // },
          commons: {
            name: 'chunk-commons',
            test: resolve('src/components'), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5,
            reuseExistingChunk: true
          }
        }
      })
      config.optimization.runtimeChunk('single')
    })
  }
}

public/index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <link rel="icon" href="<%= BASE_URL %>favicon.ico">
    <% for (var i in
      htmlWebpackPlugin.options.cdn&&htmlWebpackPlugin.options.cdn.css) { %>
      <link href="<%= htmlWebpackPlugin.options.cdn.css[i] %>" rel="preload" as="style" />
      <link href="<%= htmlWebpackPlugin.options.cdn.css[i] %>" rel="stylesheet" />
      <% } %>
    <title><%= webpackConfig.name %></title>
  </head>
  <body>
    <noscript>
      <strong>We're sorry but <%= webpackConfig.name %> doesn't work properly without JavaScript enabled. Please enable it to continue.</strong>
    </noscript>
    <div id="app"></div>
    <!-- 使用CDN加速的JS文件，配置在vue.config.js下 -->
    <% for (var i in
      htmlWebpackPlugin.options.cdn&&htmlWebpackPlugin.options.cdn.js) { %>
      <script src="<%= htmlWebpackPlugin.options.cdn.js[i] %>"></script>
    <% } %>
    <!-- built files will be auto injected -->
  </body>
</html>

babel轉 ES5

由於babel研究的還不夠透徹，因此採用了最笨的方法直接引入babel-polyfill,生產環境和開發環境都直接引用cdn js
babel.config.js 添加 useBuiltIns: 'entry'

babel.config.js

module.exports = {
  presets: [['@vue/app', { useBuiltIns: 'entry' }]],
  plugins: [
    [
      'import',
      {
        libraryName: 'vant',
        libraryDirectory: 'es',
        style: true
      },
      'vant'
    ]
  ]
}