★ vue-cli3 全面配置
★ Nuxt.js 全面配置
创建项目
配置环境变量
通过在package.json里的scripts配置项中添加--mode xxx来选择不同环境
在项目根目录中新建.env, .env.production, .env.analyz等文件
只有以 VUE_APP_ 开头的变量会被 webpack.DefinePlugin 静态嵌入到客户端侧的包中，代码中可以通过process.env.VUE_APP_BASE_API访问
NODE_ENV 和 BASE_URL 是两个特殊变量，在代码中始终可用
.env serve默认的环境变量
NODE_ENV = 'development'
VUE_APP_BASE_API = 'https://demo.cn/api'
VUE_APP_SRC = 'https://wechat-timg.oss-cn-hangzhou.aliyuncs.com/demo'.env.production build默认的环境变量
NODE_ENV = 'production'
VUE_APP_BASE_API = 'https://demo.com/api'
VUE_APP_SRC = 'https://img-wechat.oss-cn-hangzhou.aliyuncs.com/demo'.env.analyz 用于webpack-bundle-analyzer打包分析
NODE_ENV = 'production'
IS_ANALYZ = 'analyz'
VUE_APP_BASE_API = 'https://demo.com/api'
VUE_APP_SRC = 'https://img-wechat.oss-cn-hangzhou.aliyuncs.com/demo'修改package.json
"scripts": {
"serve": "vue-cli-service serve",
"build": "vue-cli-service build",
"analyz": "vue-cli-service build --mode analyz",
"lint": "vue-cli-service lint"
}配置vue.config.js
const IS_PROD = ['production', 'prod'].includes(process.env.NODE_ENV);
module.exports = {
baseUrl: './', // 默认'/'，部署应用包时的基本 URL
outputDir: process.env.outputDir || 'dist', // 'dist', 生产环境构建文件的目录
assetsDir: '', // 相对于outputDir的静态资源(js、css、img、fonts)目录
lintOnSave: false,
runtimeCompiler: true, // 是否使用包含运行时编译器的 Vue 构建版本
productionSourceMap: false, // 生产环境的 source map
parallel: require('os').cpus().length > 1,
pwa: {}
};配置proxy跨域
const IS_PROD = ['production', 'prod'].includes(process.env.NODE_ENV);
module.exports = {
devServer: {
// overlay: {
// warnings: true,
// errors: true
// },
open: IS_PROD,
host: '0.0.0.0',
port: 8000,
https: false,
hotOnly: false,
proxy: {
'/api': {
target: process.env.VUE_APP_BASE_API || 'http://127.0.0.1:8080',
changeOrigin: true
}
}
}
}修复HMR(热更新)失效
module.exports = {
chainWebpack: config => {
// 修复HMR
config.resolve.symlinks(true);
}
}添加别名
const path = require('path');
const resolve = (dir) => path.join(__dirname, dir);
const IS_PROD = ['production', 'prod'].includes(process.env.NODE_ENV);
module.exports = {
chainWebpack: config => {
// 添加别名
config.resolve.alias
.set('@', resolve('src'))
.set('assets', resolve('src/assets'))
.set('components', resolve('src/components'))
.set('layout', resolve('src/layout'))
.set('base', resolve('src/base'))
.set('static', resolve('src/static'));
}
}添加打包分析
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
module.exports = {
chainWebpack: config => {
// 打包分析
if (process.env.IS_ANALYZ) {
config.plugin('webpack-report')
.use(BundleAnalyzerPlugin, [{
analyzerMode: 'static',
}]);
}
}
}配置externals
防止将某些 import 的包(package)打包到 bundle 中，而是在运行时(runtime)再去从外部获取这些扩展依赖
module.exports = {
configureWebpack: config => {
config.externals = {
'vue': 'Vue',
'element-ui': 'ELEMENT',
'vue-router': 'VueRouter',
'vuex': 'Vuex',
'axios': 'axios'
}
}
}去掉console.log
方法一：
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
module.exports = {
configureWebpack: config => {
if (IS_PROD) {
const plugins = [];
plugins.push(
new UglifyJsPlugin({
uglifyOptions: {
compress: {
warnings: false,
drop_console: true,
drop_debugger: false,
pure_funcs: ['console.log']//移除console
}
},
sourceMap: false,
parallel: true
})
);
config.plugins = [
...config.plugins,
...plugins
];
}
}
}方法二：使用babel-plugin-transform-remove-console插件
npm i --save-dev babel-plugin-transform-remove-console在babel.config.js中配置
const plugins = [];
if(['production', 'prod'].includes(process.env.NODE_ENV)) {
plugins.push("transform-remove-console")
}
module.exports = {
presets: [["@vue/app",{"useBuiltIns": "entry"}]],
plugins: plugins
};
开启gzip压缩
npm i --save-dev compression-webpack-pluginconst CompressionWebpackPlugin = require('compression-webpack-plugin');
const productionGzipExtensions = /\.(js|css|json|txt|html|ico|svg)(\?.*)?$/i;
module.exports = {
configureWebpack: config => {
if (IS_PROD) {
const plugins = [];
plugins.push(
new CompressionWebpackPlugin({
filename: '[path].gz[query]',
algorithm: 'gzip',
test: productionGzipExtensions,
threshold: 10240,
minRatio: 0.8
})
);
config.plugins = [
...config.plugins,
...plugins
];
}
}
}还可以开启比gzip体验更好的Zopfli压缩详见https://webpack.js.org/plugins/compression-webpack-plugin
npm i --save-dev @gfx/zopfli brotli-webpack-pluginconst CompressionWebpackPlugin = require('compression-webpack-plugin');
const zopfli = require("@gfx/zopfli");
const BrotliPlugin = require("brotli-webpack-plugin");
const productionGzipExtensions = /\.(js|css|json|txt|html|ico|svg)(\?.*)?$/i;
module.exports = {
configureWebpack: config => {
if (IS_PROD) {
const plugins = [];
plugins.push(
new CompressionWebpackPlugin({
algorithm(input, compressionOptions, callback) {
return zopfli.gzip(input, compressionOptions, callback);
},
compressionOptions: {
numiterations: 15
},
minRatio: 0.99,
test: productionGzipExtensions
})
);
plugins.push(
new BrotliPlugin({
test: productionGzipExtensions,
minRatio: 0.99
})
);
config.plugins = [
...config.plugins,
...plugins
];
}
}
}为sass提供全局样式，以及全局变量
可以通过在main.js中Vue.prototype.$src = process.env.VUE_APP_SRC;挂载环境变量中的配置信息，然后在js中使用$src访问。
css中可以使用注入sass变量访问环境变量中的配置信息
module.exports = {
css: {
modules: false,
extract: IS_PROD,
sourceMap: false,
loaderOptions: {
sass: {
// 向全局sass样式传入共享的全局变量
data: `@import "~assets/scss/variables.scss";$src: "${process.env.VUE_APP_SRC}";`
}
}
}
}在scss中引用
.home {
background: url($src + '/images/500.png');
}添加IE兼容
npm i --save @babel/polyfill在main.js中添加
import '@babel/polyfill';配置babel.config.js
const plugins = [];
module.exports = {
presets: [["@vue/app",{"useBuiltIns": "entry"}]],
plugins: plugins
};
完整配置
vue-cli3-config github持续更新中
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