webpack 开发环境与生成环境的 配置

写在前面

最近学习react,之前做vue项目的时候,一直都是拿来主义,浑浑噩噩,感觉不太好,趁学习react的机会,在顺带学习一下webpack。一般配置文件分两份,为开发环境和生成环境。有此区分,是为了更好的利用缓存,生成环境将所有的第三分库文件打包成一个,所有的业务逻辑的文件就会单独生成一个,每次业务逻辑的修改之后,在生成环境中只需要上传修改代码逻辑的部分,而第三方库文件则不会修改,如此只需更新少量的代码,增加加载的速度。

webpack.config.js 开发开发环境的配置

package.json文件的内容


{
"name": "react-dianping-webpack",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"start": "NODE_ENV=dev webpack-dev-server --progress --colors",
"build": "rm -rf ./build && NODE_ENV=production webpack --config ./webpack.production.config.js --progress --colors"
},
"author": "",
"license": "ISC",
"devDependencies": {
"autoprefixer": "^6.4.0",
"babel-core": "^6.14.0",
"babel-loader": "^6.2.5",
"babel-plugin-react-transform": "^2.0.2",
"babel-preset-es2015": "^6.14.0",
"babel-preset-react": "^6.11.1",
"css-loader": "^0.24.0",
"eslint": "^3.4.0",
"eslint-loader": "^1.5.0",
"extract-text-webpack-plugin": "^1.0.1",
"file-loader": "^0.9.0",
"html-webpack-plugin": "^2.22.0",
"json-loader": "^0.5.4",
"koa": "^1.2.2",
"koa-router": "^5.4.0",
"less": "^2.7.1",
"less-loader": "^2.2.3",
"open-browser-webpack-plugin": "0.0.2",
"postcss-loader": "^0.11.0",
"react-transform-hmr": "^1.0.4",
"style-loader": "^0.13.1",
"url-loader": "^0.5.7",
"webpack": "^1.13.2",
"webpack-dev-server": "^1.15.0"
},
"dependencies": {
"react": "^15.3.1",
"react-dom": "^15.3.1"
}
}

weboack.config.js文件的配置

var path =require('path')
var webpack = require('webpack') // 在package.json之中(dev)dependencies的名字,main
var HtmlWebpackPlugin = require('html-webpack-plugin') // 可以指定打包完成之后的js文件的挂载点
var OpenBrowserPlugin = require('open-browser-webpack-plugin') // 浏览器自动打开文件 module.exports = {
entry:path.resolve(__dirname,'app/index.jsx'), // 打包入口文件
output:{
filename:"bundle.js"
},
resolve:{
extensions:['','js','jsx'],// require 或者import的时候,不需要添加的文件后缀名
},
module:{
loaders:[
{test:/\.(js|jsx)$/,exclude:/node_modules/,loader:'babel'},
{test:/\.less$/,exclude:/node_modules/,loader:'style!css!postcss!less'},// css-loader引入css文件,style-loader创建style标签,从右向左执行,顺序不可改变。
{test:/\.css$/,exclude:/node_modules/,loader:'style!css!postcss'},
{test:/\.(png|gif|jpg|jpeg|bmp)$/i,exclude:/node_modules/,loader:'url-loader?limit=5000'}, // Loads files as `base64` encoded URL
{test:/\.(png|woff|woff2|svg|ttf|eot)($|\?)/i,exclude:/node_modules/,loader:'url-loader?limit=5000'}
]
}, postcss:[
require('autoprefixer') //调用autoprefixer插件,例如 display: flex
], plugins:[
// html 模板插件
new HtmlWebpackPlugin({
template:__dirname+ '/app/index.tmpl.html'
}), // 热加载插件,即不用刷新浏览器便可以展现修改
new webpack.HotModuleReplacementPlugin(), // 运行终端就可以打开文件
new OpenBrowserPlugin({
url: 'http://localhost:8080'
}), // 定义生产环境还是开发环境,一般是配合package.json之中的script标签的使用
new webpack.DefinePlugin({
__DEV__:JSON.stringify(JSON.parse((ProgressEvent.evn.NODE_DEV == "dev") || false))
})
], devServer: {
colors: true, //终端中输出结果为彩色
historyApiFallback: true, //不跳转,在开发单页应用时非常有用,它依赖于HTML5 history API,如果设置为true,所有的跳转将指向index.html
inline: true, //实时刷新
hot: true // 使用热加载插件 HotModuleReplacementPlugin
} }

生产环境中的webpack.production.config.js的配置


var pkg = require('./package.json')
var path = require('path')
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var ExtractTextPlugin = require('extract-text-webpack-plugin'); module.exports = {
entry: {
app: path.resolve(__dirname, 'app/index.jsx'),
// 将 第三方依赖(node_modules中的) 单独打包
vendor: Object.keys(pkg.dependencies)
},
output: {
path: __dirname + "/build",
filename: "/js/[name].[chunkhash:8].js"
}, resolve:{
extensions:['', '.js','.jsx']
}, module: {
loaders: [
{ test: /\.(js|jsx)$/, exclude: /node_modules/, loader: 'babel' },
{ test: /\.less$/, exclude: /node_modules/, loader: ExtractTextPlugin.extract('style', 'css!postcss!less') },
{ test: /\.css$/, exclude: /node_modules/, loader: ExtractTextPlugin.extract('style', 'css!postcss') },
{ test:/\.(png|gif|jpg|jpeg|bmp)$/i, loader:'url-loader?limit=5000&name=img/[name].[chunkhash:8].[ext]' },
{ test:/\.(png|woff|woff2|svg|ttf|eot)($|\?)/i, loader:'url-loader?limit=5000&name=fonts/[name].[chunkhash:8].[ext]'}
]
},
postcss: [
require('autoprefixer')
], plugins: [
// webpack 内置的 banner-plugin
new webpack.BannerPlugin("Copyright by wangfupeng1988@github.com."), // html 模板插件
new HtmlWebpackPlugin({
template: __dirname + '/app/index.tmpl.html'
}), // 定义为生产环境,编译 React 时压缩到最小
new webpack.DefinePlugin({
'process.env':{
'NODE_ENV': JSON.stringify(process.env.NODE_ENV)
}
}), // 为组件分配ID,通过这个插件webpack可以分析和优先考虑使用最多的模块,并为它们分配最小的ID
new webpack.optimize.OccurenceOrderPlugin(), new webpack.optimize.UglifyJsPlugin({
compress: {
//supresses warnings, usually from module minification
warnings: false
}
}), // 分离CSS和JS文件
new ExtractTextPlugin('/css/[name].[chunkhash:8].css'), // 提供公共代码
new webpack.optimize.CommonsChunkPlugin({
name: 'vendor',
filename: '/js/[name].[chunkhash:8].js'
}), // 可在业务 js 代码中使用 __DEV__ 判断是否是dev模式(dev模式下可以提示错误、测试报告等, production模式不提示)
new webpack.DefinePlugin({
__DEV__: JSON.stringify(JSON.parse((process.env.NODE_ENV == 'dev') || 'false'))
})
]
}
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