项目是基于Vue-cli webpack构建的项目，所以使用的webpack是3版本，vue-loader是13版本，所以有些配置需要修改。
1.先把package.json装过的依赖贴出来
{
"name": "app",
"version": "1.0.0",
"description": "A Vue.js project",
"author": "Visupervi <1109358872@qq.com>",
"private": true,
"scripts": {
"dev": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js",
"start": "npm run dev",
"unit": "jest --config test/unit/jest.conf.js --coverage",
"e2e": "node test/e2e/runner.js",
"test": "npm run unit && npm run e2e",
"build": "node build/build.js"
},
"dependencies": {
"axios": "^0.18.0",
"babel-polyfill": "^6.26.0",
"babel-runtime": "^6.26.0",
"cors": "^2.8.5",
"element-ui": "^2.5.4",
"extract-text-webpack-plugin": "^4.0.0-beta.0",
"i": "^0.3.6",
"iview": "^3.2.2",
"less": "^3.9.0",
"less-loader": "^4.1.0",
"mini-css-extract-plugin": "^0.5.0",
"npm": "^6.5.0",
"qs": "^6.6.0",
"vue": "^2.5.2",
"vue-router": "^3.0.1",
"vuex": "^3.0.1"
},
"devDependencies": {
"acorn": "^6.1.0",
"acorn-jsx": "^5.0.1",
"autoprefixer": "^7.1.2",
"babel-core": "^6.22.1",
"babel-helper-vue-jsx-merge-props": "^2.0.3",
"babel-jest": "^21.0.2",
"babel-loader": "^7.1.1",
"babel-plugin-dynamic-import-node": "^1.2.0",
"babel-plugin-syntax-jsx": "^6.18.0",
"babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
"babel-plugin-transform-runtime": "^6.22.0",
"babel-plugin-transform-vue-jsx": "^3.5.0",
"babel-preset-env": "^1.3.2",
"babel-preset-stage-2": "^6.22.0",
"babel-register": "^6.22.0",
"chalk": "^2.0.1",
"chromedriver": "^2.27.2",
"copy-webpack-plugin": "^5.0.0",
"cross-spawn": "^5.0.1",
"css-loader": "^2.1.0",
"eslint": "^3.17.0",
"eslint-loader": "^2.1.2",
"file-loader": "^3.0.1",
"friendly-errors-webpack-plugin": "^1.7.0",
"html-webpack-plugin": "^3.2.0",
"jest": "^22.0.4",
"jest-serializer-vue": "^0.3.0",
"mini-css-extract-plugin": "^0.5.0",
"nightwatch": "^0.9.12",
"node-notifier": "^5.1.2",
"optimize-css-assets-webpack-plugin": "^5.0.1",
"ora": "^1.2.0",
"portfinder": "^1.0.13",
"postcss-import": "^11.0.0",
"postcss-loader": "^2.0.8",
"postcss-url": "^7.2.1",
"rimraf": "^2.6.0",
"selenium-server": "^3.0.1",
"semver": "^5.3.0",
"shelljs": "^0.7.6",
"uglifyjs-webpack-plugin": "^2.1.1",
"url-loader": "^1.1.2",
"vue-jest": "^1.0.2",
"vue-loader": "^15.6.4",
"vue-style-loader": "^4.1.2",
"vue-template-compiler": "^2.6.7",
"webpack": "^4.29.5",
"webpack-bundle-analyzer": "^3.0.4",
"webpack-cli": "^3.2.3",
"webpack-dev-server": "^3.2.0",
"webpack-merge": "^4.2.1"
},
"engines": {
"node": ">= 6.0.0",
"npm": ">= 3.0.0"
},
"browserslist": [
"> 1%",
"last 2 versions",
"not ie <= 8"
]
}
复制代码这次把webpack升级到4.29.5，然后vue-loader升级到15，其他一些也是按照npm上最新的version更新。
2. 修改build文件夹下面的配置文件
<1> 首先修改 webpack.base.conf.js
'use strict'
const path = require('path')
const utils = require('./utils')
const config = require('../config')
const vueLoaderConfig = require('./vue-loader.conf')
function resolve (dir) {
return path.join(__dirname, '..', dir)
}
const createLintingRule = () => ({
test: /\.(js|vue)$/,
loader: 'eslint-loader',
enforce: 'pre',
include: [resolve('src'), resolve('test')],
options: {
formatter: require('eslint-friendly-formatter'),
emitWarning: !config.dev.showEslintErrorsInOverlay
}
})
module.exports = {
context: path.resolve(__dirname, '../'),
entry: {
app: './src/main.js'
},
output: {
path: config.build.assetsRoot,
filename: '[name].js',
publicPath: process.env.NODE_ENV === 'production'
? config.build.assetsPublicPath
: config.dev.assetsPublicPath
},
resolve: {
extensions: ['.js', '.vue', '.json'],
alias: {
'vue$': 'vue/dist/vue.esm.js',
'@': resolve('src'),
}
},
module: {
rules: [
...(config.dev.useEslint ? [createLintingRule()] : []),
{
test: /\.vue$/,
loader: 'vue-loader',
options: vueLoaderConfig
},
{
test: /\.js$/,
loader: 'babel-loader',
include: [resolve('src'), resolve('test'), resolve('node_modules/webpack-dev-server/client')]
},
{
test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
loader: 'url-loader',
options: {
limit: 10000,
name: utils.assetsPath('img/[name].[hash:7].[ext]')
}
},
{
test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
loader: 'url-loader',
options: {
limit: 10000,
name: utils.assetsPath('media/[name].[hash:7].[ext]')
}
},
{
test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
loader: 'url-loader',
options: {
limit: 10000,
name: utils.assetsPath('fonts/[name].[hash:7].[ext]')
}
}
]
},
node: {
// prevent webpack from injecting useless setImmediate polyfill because Vue
// source contains it (although only uses it if it's native).
setImmediate: false,
// prevent webpack from injecting mocks to Node native modules
// that does not make sense for the client
dgram: 'empty',
fs: 'empty',
net: 'empty',
tls: 'empty',
child_process: 'empty'
}
}
复制代码<2> 然后修改 webpack.dev.conf.js
'use strict'
const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const merge = require('webpack-merge')
const path = require('path')
const baseWebpackConfig = require('./webpack.base.conf')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin')
const portfinder = require('portfinder')
const VueLoaderPlugin = require('vue-loader/lib/plugin')
const HOST = process.env.HOST
const PORT = process.env.PORT && Number(process.env.PORT)
const devWebpackConfig = merge(baseWebpackConfig, {
module: {
rules: utils.styleLoaders({ sourceMap: config.dev.cssSourceMap, usePostCSS: true })
},
// cheap-module-eval-source-map is faster for development
devtool: config.dev.devtool,
mode: 'development',
// these devServer options should be customized in /config/index.js
devServer: {
clientLogLevel: 'warning',
historyApiFallback: {
rewrites: [
{ from: /.*/, to: path.posix.join(config.dev.assetsPublicPath, 'index.html') },
],
},
hot: true,
contentBase: false, // since we use CopyWebpackPlugin.
compress: true,
host: HOST || config.dev.host,
port: PORT || config.dev.port,
open: config.dev.autoOpenBrowser,
overlay: config.dev.errorOverlay
? { warnings: false, errors: true }
: false,
publicPath: config.dev.assetsPublicPath,
proxy: config.dev.proxyTable,
quiet: true, // necessary for FriendlyErrorsPlugin
watchOptions: {
poll: config.dev.poll,
}
},
plugins: [
new VueLoaderPlugin(),
new webpack.HotModuleReplacementPlugin(),
// https://github.com/ampedandwired/html-webpack-plugin
new HtmlWebpackPlugin({
filename: 'index.html',
template: 'index.html',
inject: true
}),
// copy custom static assets
new CopyWebpackPlugin([
{
from: path.resolve(__dirname, '../static'),
to: config.dev.assetsSubDirectory,
ignore: ['.*']
}
])
]
})
module.exports = new Promise((resolve, reject) => {
portfinder.basePort = process.env.PORT || config.dev.port
portfinder.getPort((err, port) => {
if (err) {
reject(err)
} else {
// publish the new Port, necessary for e2e tests
process.env.PORT = port
// add port to devServer config
devWebpackConfig.devServer.port = port
// Add FriendlyErrorsPlugin
devWebpackConfig.plugins.push(new FriendlyErrorsPlugin({
compilationSuccessInfo: {
messages: [`Your application is running here: http://${devWebpackConfig.devServer.host}:${port}`],
},
onErrors: config.dev.notifyOnErrors
? utils.createNotifierCallback()
: undefined
}))
resolve(devWebpackConfig)
}
})
})
##### <3> 再修改 webpack.prod.conf.js
'use strict'
const path = require('path')
const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const merge = require('webpack-merge')
const baseWebpackConfig = require('./webpack.base.conf')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
const VueLoaderPlugin = require('vue-loader/lib/plugin')
const env = require('../config/prod.env')
const webpackConfig = merge(baseWebpackConfig, {
module: {
rules: utils.styleLoaders({
sourceMap: config.build.productionSourceMap,
extract: true,
usePostCSS: true
})
},
devtool: config.build.productionSourceMap ? config.build.devtool : false,
mode: 'production',
output: {
path: config.build.assetsRoot,
filename: utils.assetsPath('js/[name].[chunkhash].js'),
chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
},
optimization: {
splitChunks: {
cacheGroups: {
vendors: {
test: /[\\/]node_modules[\\/]/,
chunks: 'initial',
name: 'vendors',
},
'async-vendors': {
test: /[\\/]node_modules[\\/]/,
minChunks: 2,
chunks: 'async',
name: 'async-vendors'
}
}
},
runtimeChunk: { name: 'runtime' }
},
plugins: [
new VueLoaderPlugin(),
new ExtractTextPlugin({
filename: utils.assetsPath('css/[name].css'),
// Setting the following option to `false` will not extract CSS from codesplit chunks.
// Their CSS will instead be inserted dynamically with style-loader when the codesplit chunk has been loaded by webpack.
// It's currently set to `true` because we are seeing that sourcemaps are included in the codesplit bundle as well when it's `false`,
// increasing file size: https://github.com/vuejs-templates/webpack/issues/1110
allChunks: true,
}),
// Compress extracted CSS. We are using this plugin so that possible
// duplicated CSS from different components can be deduped.
new OptimizeCSSPlugin({
cssProcessorOptions: config.build.productionSourceMap
? { safe: true, map: { inline: false } }
: { safe: true }
}),
// generate dist index.html with correct asset hash for caching.
// you can customize output by editing /index.html
// see https://github.com/ampedandwired/html-webpack-plugin
new HtmlWebpackPlugin({
filename: config.build.index,
template: 'index.html',
inject: true,
minify: {
removeComments: true,
collapseWhitespace: true,
removeAttributeQuotes: true
// more options:
// https://github.com/kangax/html-minifier#options-quick-reference
},
// necessary to consistently work with multiple chunks via CommonsChunkPlugin
chunksSortMode: 'dependency'
}),
// keep module.id stable when vendor modules does not change
new webpack.HashedModuleIdsPlugin(),
// enable scope hoisting
new webpack.optimize.ModuleConcatenationPlugin(),
// split vendor js into its own file
// new webpack.optimize.CommonsChunkPlugin({
// name: 'vendor',
// minChunks (module) {
// // any required modules inside node_modules are extracted to vendor
// return (
// module.resource &&
// /\.js$/.test(module.resource) &&
// module.resource.indexOf(
// path.join(__dirname, '../node_modules')
// ) === 0
// )
// }
// }),
// extract webpack runtime and module manifest to its own file in order to
// prevent vendor hash from being updated whenever app bundle is updated
// new webpack.optimize.CommonsChunkPlugin({
// name: 'manifest',
// minChunks: Infinity
// }),
// This instance extracts shared chunks from code splitted chunks and bundles them
// in a separate chunk, similar to the vendor chunk
// see: https://webpack.js.org/plugins/commons-chunk-plugin/#extra-async-commons-chunk
// new webpack.optimize.CommonsChunkPlugin({
// name: 'app',
// async: 'vendor-async',
// children: true,
// minChunks: 3
// }),
// copy custom static assets
new CopyWebpackPlugin([
{
from: path.resolve(__dirname, '../static'),
to: config.build.assetsSubDirectory,
ignore: ['.*']
}
])
]
})
if (config.build.productionGzip) {
const CompressionWebpackPlugin = require('compression-webpack-plugin')
webpackConfig.plugins.push(
new CompressionWebpackPlugin({
asset: '[path].gz[query]',
algorithm: 'gzip',
test: new RegExp(
'\\.(' +
config.build.productionGzipExtensions.join('|') +
')$'
),
threshold: 10240,
minRatio: 0.8
})
)
}
if (config.build.bundleAnalyzerReport) {
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
webpackConfig.plugins.push(new BundleAnalyzerPlugin())
}
module.exports = webpackConfig
复制代码3.遇见的问题以及解决办法
1.使用了mini-css-extract-plugin以后报错
本来是想使用这个loader来分离css但是一阵操作猛如虎，发现不能运行。 网上大神们的代码
// webpack.prod.conf.js
// const ExtractTextPlugin = require('extract-text-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
// ...
// extract css into its own file
// new ExtractTextPlugin({
// ...
// })
// 升级 webpack4， 由 ExtractTextPlugin 改用 MiniCssExtractPlugin
new MiniCssExtractPlugin({
filename: utils.assetsPath('css/[name].[contenthash].css'),
allChunks: true,
}),
//utils.js
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
// ...
// extract css into its own file
// new ExtractTextPlugin({
// ...
// })
// 升级 webpack4， 由 ExtractTextPlugin 改用 MiniCssExtractPlugin
new MiniCssExtractPlugin({
filename: utils.assetsPath('css/[name].[contenthash].css'),
allChunks: true,
}),
// utils.js
// const ExtractTextPlugin = require('extract-text-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
// ...
// generate loader string to be used with extract text plugin
function generateLoaders (loader, loaderOptions) {
const loaders = options.usePostCSS ? [cssLoader, postcssLoader] : [cssLoader]
if (loader) {
loaders.push({
loader: loader + '-loader',
options: Object.assign({}, loaderOptions, {
sourceMap: options.sourceMap
})
})
}
// Extract CSS when that option is specified
// (which is the case during production build)
// if (options.extract) {
// return ExtractTextPlugin.extract({
// use: loaders,
// fallback: 'vue-style-loader'
// })
// } else {
// return ['vue-style-loader'].concat(loaders)
// }
// 升级 webpack4， 由 ExtractTextPlugin 改用 MiniCssExtractPlugin
return [
options.extract ? MiniCssExtractPlugin.loader : 'vue-style-loader',
].concat(loaders)
}
复制代码2.这样配置肯定是不对的
我看了一下vue-loader的文档之后分别再开发 和生产环境的配置文件上加上下面代码
const VueLoaderPlugin = require('vue-loader/lib/plugin')
plugins[
new VueLoaderPlugin(),
]
复制代码这样满心欢喜的npm run build或者npm run dev，发现这次找不到element-ui的css和iview的css文件，我记得我的地址早就修改了，查一下什么原因有说是加上css-loader就试了一下，运行发现找不到.vue文件，到这里我知道可能是MiniCssExtractPlugin配置写的有问题，但是实在是不知道 配置如何写，这个时候又发现一个不同的写法，就是在base配置loader的时候配置它的loader
rules: [
{
test: /\.css$/,
use: [
{
loader: MiniCssExtractPlugin.loader,
options: {
// 这里可以指定一个 publicPath
// 默认使用 webpackOptions.output中的publicPath
publicPath: '../'
},
},
'css-loader',
],
复制代码3.经过上面的配置，运行以后发现css文件怎么跑到命令窗口里来了，真是日了狗了啊，我没截图，反正挺搞笑的。
这个问题百度都查不到啊，点一根烟继续分析一下·······99%是出现在mini-css-extract-plugin，所以果断把它干掉。
查了一下extract-text-webpack-plugin哪一个版本支持webpack4，果然有beta版本支持，然后又该回到extract-text-webpack-plugin。 当然了，webpack4本身就有的一些配置你就不用再配置了，所以把webpack.prod.conf.js中
webpack.optimize.ModuleConcatenationPlugin()，
webpack.optimize.CommonsChunkPlugin，
new webpack.optimize.CommonsChunkPlugin
复制代码这些配置去掉就好了。
4.一运行还是不行
分别再生产环境和开发环境加上mode:'production'和mode:'development'
再在生产环境中添加
optimization: {
splitChunks: {
cacheGroups: {
vendors: {
test: /[\\/]node_modules[\\/]/,
chunks: 'initial',
name: 'vendors',
},
'async-vendors': {
test: /[\\/]node_modules[\\/]/,
minChunks: 2,
chunks: 'async',
name: 'async-vendors'
}
}
},
runtimeChunk: { name: 'runtime' }
}
复制代码