盒子
盒子
文章目录󰁋
  1. 一、功能类
    1. 1.1 html-webpack-plugin
    2. 1.2 copy-webpack-plugin
    3. 1.3 webpack-manifest-plugin && assets-webpack-plugin
    4. 1.4 clean-webpack-plugin
    5. 1.5 compression-webpack-plugin
    6. 1.6 progress-bar-webpack-plugin
  2. 二、代码相关类
    1. 2.1 webpack.ProvidePlugin
    2. 2.2 webpack.DefinePlugin
    3. 2.3 mini-css-extract-plugin && extract-text-webpack-plugin
  3. 三、编译结果优化类
    1. 3.1 wbepack.IgnorePlugin
    2. 3.2 uglifyjs-webpack-plugin
    3. 3.3 optimize-css-assets-webpack-plugin
    4. 3.4 webpack-md5-hash
    5. 3.5 SplitChunksPlugin
  4. 四、编译优化类
    1. 4.1 DllPlugin && DllReferencePlugin && autodll-webpack-plugin
    2. 4.2 happypack && thread-loader
    3. 4.3 hard-source-webpack-plugin && cache-loader
  5. 五、编译分析类
    1. 5.1 webpack-bundle-analyzer
    2. 5.2 stats-webpack-plugin && PrefetchPlugin
    3. 5.3 speed-measure-webpack-plugin

webpack常用插件总结篇

一、功能类

1.1 html-webpack-plugin

自动生成html,基本用法:

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new HtmlWebpackPlugin({
filename: 'index.html', // 生成文件名
template: path.join(process.cwd(), './index.html') // 模班文件
})

1.2 copy-webpack-plugin

拷贝资源插件

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new CopyWebpackPlugin([
{
from: path.join(process.cwd(), './vendor/'),
to: path.join(process.cwd(), './dist/'),
ignore: ['*.json']
}
])

1.3 webpack-manifest-plugin && assets-webpack-plugin

俩个插件效果一致,都是生成编译结果的资源单,只是资源单的数据结构不一致而已

webpack-manifest-plugin 基本用法

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module.exports = {
plugins: [
new ManifestPlugin()
]
}

assets-webpack-plugin 基本用法

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module.exports = {
plugins: [
new AssetsPlugin()
]
}

1.4 clean-webpack-plugin

在编译之前清理指定目录指定内容

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// 清理目录
const pathsToClean = [
'dist',
'build'
]

// 清理参数
const cleanOptions = {
exclude: ['shared.js'], // 跳过文件
}
module.exports = {
// ...
plugins: [
new CleanWebpackPlugin(pathsToClean, cleanOptions)
]
}

1.5 compression-webpack-plugin

提供带 Content-Encoding 编码的压缩版的资源

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module.exports = {
plugins: [
new CompressionPlugin()
]
}

1.6 progress-bar-webpack-plugin

编译进度条插件

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module.exports = {
//...
plugins: [
new ProgressBarPlugin()
]
}

二、代码相关类

2.1 webpack.ProvidePlugin

自动加载模块,如 $ 出现,就会自动加载模块;$ 默认为'jquery'exports

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new webpack.ProvidePlugin({
$: 'jquery',
})

2.2 webpack.DefinePlugin

定义全局常量

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new webpack.DefinePlugin({
'process.env': {
NODE_ENV: JSON.stringify(process.env.NODE_ENV)
}
})

2.3 mini-css-extract-plugin && extract-text-webpack-plugin

提取css样式,对比

  • mini-css-extract-pluginwebpack4及以上提供的plugin,支持css chunk
  • extract-text-webpack-plugin 只能在webpack3 及一下的版本使用,不支持css chunk

基本用法 extract-text-webpack-plugin

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const ExtractTextPlugin = require("extract-text-webpack-plugin");

module.exports = {
module: {
rules: [
{
test: /\.css$/,
use: ExtractTextPlugin.extract({
fallback: "style-loader",
use: "css-loader"
})
}
]
},
plugins: [
new ExtractTextPlugin("styles.css"),
]
}

基本用法 mini-css-extract-plugin

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const MiniCssExtractPlugin = require("mini-css-extract-plugin");
module.exports = {
module: {
rules: [
{
test: /\.css$/,
use: [
{
loader: MiniCssExtractPlugin.loader,
options: {
publicPath: '/' // chunk publicPath
}
},
"css-loader"
]
}
]
},
plugins: [
new MiniCssExtractPlugin({
filename: "[name].css", // 主文件名
chunkFilename: "[id].css" // chunk文件名
})
]
}

三、编译结果优化类

3.1 wbepack.IgnorePlugin

忽略regExp匹配的模块

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new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/)

3.2 uglifyjs-webpack-plugin

代码丑化,用于js压缩

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module.exports = {
//...
optimization: {
minimizer: [new UglifyJsPlugin({
cache: true, // 开启缓存
parallel: true, // 开启多线程编译
sourceMap: true, // 是否sourceMap
uglifyOptions: { // 丑化参数
comments: false,
warnings: false,
compress: {
unused: true,
dead_code: true,
collapse_vars: true,
reduce_vars: true
},
output: {
comments: false
}
}
}]
}
};

3.3 optimize-css-assets-webpack-plugin

css压缩,主要使用 cssnano 压缩器 https://github.com/cssnano/cssnano

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module.exports = {
//...
optimization: {
minimizer: [new OptimizeCssAssetsPlugin({
cssProcessor: require('cssnano'), // css 压缩优化器
cssProcessorOptions: { discardComments: { removeAll: true } } // 去除所有注释
})]
}
};

3.4 webpack-md5-hash

使你的chunk根据内容生成md5,用这个md5取代 webpack chunkhash

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var WebpackMd5Hash = require('webpack-md5-hash');

module.exports = {
// ...
output: {
//...
chunkFilename: "[chunkhash].[id].chunk.js"
},
plugins: [
new WebpackMd5Hash()
]
};

3.5 SplitChunksPlugin

  • CommonChunkPlugin 的后世,用于chunk切割。

webpackchunk 分为两种类型,一种是初始加载initial chunk,另外一种是异步加载 async chunk,如果不配置SplitChunksPluginwebpack会在production的模式下自动开启,默认情况下,webpack会将 node_modules 下的所有模块定义为异步加载模块,并分析你的 entry、动态加载(import()require.ensure)模块,找出这些模块之间共用的node_modules下的模块,并将这些模块提取到单独的chunk中,在需要的时候异步加载到页面当中,其中默认配置如下

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module.exports = {
//...
optimization: {
splitChunks: {
chunks: 'async', // 异步加载chunk
minSize: 30000,
maxSize: 0,
minChunks: 1,
maxAsyncRequests: 5,
maxInitialRequests: 3,
automaticNameDelimiter: '~', // 文件名中chunk分隔符
name: true,
cacheGroups: {
vendors: {
test: /[\\/]node_modules[\\/]/, //
priority: -10
},
default: {
minChunks: 2, // 最小的共享chunk数
priority: -20,
reuseExistingChunk: true
}
}
}
}
};

四、编译优化类

4.1 DllPlugin && DllReferencePlugin && autodll-webpack-plugin

  • dllPlugin将模块预先编译,DllReferencePlugin 将预先编译好的模块关联到当前编译中,当 webpack 解析到这些模块时,会直接使用预先编译好的模块。
  • autodll-webpack-plugin 相当于 dllPluginDllReferencePlugin 的简化版,其实本质也是使用 dllPlugin && DllReferencePlugin,它会在第一次编译的时候将配置好的需要预先编译的模块编译在缓存中,第二次编译的时候,解析到这些模块就直接使用缓存,而不是去编译这些模块

dllPlugin 基本用法:

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const output = {
filename: '[name].js',
library: '[name]_library',
path: './vendor/'
}

module.exports = {
entry: {
vendor: ['react', 'react-dom'] // 我们需要事先编译的模块,用entry表示
},
output: output,
plugins: [
new webpack.DllPlugin({ // 使用dllPlugin
path: path.join(output.path, `${output.filename}.json`),
name: output.library // 全局变量名, 也就是 window 下 的 [output.library]
})
]
}

DllReferencePlugin 基本用法:

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const manifest = path.resolve(process.cwd(), 'vendor', 'vendor.js.json')

module.exports = {
plugins: [
new webpack.DllReferencePlugin({
manifest: require(manifest), // 引进dllPlugin编译的json文件
name: 'vendor_library' // 全局变量名,与dllPlugin声明的一致
}
]
}

autodll-webpack-plugin 基本用法:

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module.exports = {
plugins: [
new AutoDllPlugin({
inject: true, // 与 html-webpack-plugin 结合使用,注入html中
filename: '[name].js',
entry: {
vendor: [
'react',
'react-dom'
]
}
})
]
}

4.2 happypack && thread-loader

多线程编译,加快编译速度,thread-loader不可以和 mini-css-extract-plugin 结合使用

happypack 基本用法

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const HappyPack = require('happypack');
const os = require('os');
const happyThreadPool = HappyPack.ThreadPool({ size: os.cpus().length });
const happyLoaderId = 'happypack-for-react-babel-loader';

module.exports = {
module: {
rules: [{
test: /\.jsx?$/,
loader: 'happypack/loader',
query: {
id: happyLoaderId
},
include: [path.resolve(process.cwd(), 'src')]
}]
},
plugins: [new HappyPack({
id: happyLoaderId,
threadPool: happyThreadPool,
loaders: ['babel-loader']
})]
}

thread-loader 基本用法

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module.exports = {
module: {
rules: [
{
test: /\.js$/,
include: path.resolve("src"),
use: [
"thread-loader",
// your expensive loader (e.g babel-loader)
"babel-loader"
]
}
]
}
}

4.3 hard-source-webpack-plugin && cache-loader

使用模块编译缓存,加快编译速度

hard-source-webpack-plugin 基本用法

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module.exports = {
plugins: [
new HardSourceWebpackPlugin()
]
}

cache-loader 基本用法

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module.exports = {
module: {
rules: [
{
test: /\.ext$/,
use: [
'cache-loader',
...loaders
],
include: path.resolve('src')
}
]
}
}

五、编译分析类

5.1 webpack-bundle-analyzer

编译模块分析插件

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new BundleAnalyzerPlugin({
analyzerMode: 'server',
analyzerHost: '127.0.0.1',
analyzerPort: 8889,
reportFilename: 'report.html',
defaultSizes: 'parsed',
generateStatsFile: false,
statsFilename: 'stats.json',
statsOptions: null,
logLevel: 'info'
}),

5.2 stats-webpack-plugin && PrefetchPlugin

stats-webpack-plugin 将构建的统计信息写入文件,该文件可在 http://webpack.github.io/analyse中上传进行编译分析,并根据分析结果,可使用 PrefetchPlugin 对部分模块进行预解析编译

stats-webpack-plugin 基本用法:

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module.exports = {
plugins: [
new StatsPlugin('stats.json', {
chunkModules: true,
exclude: [/node_modules[\\\/]react/]
})
]
};

PrefetchPlugin 基本用法:

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module.exports = {
plugins: [
new webpack.PrefetchPlugin('/web/', 'app/modules/HeaderNav.jsx'),
new webpack.PrefetchPlugin('/web/', 'app/pages/FrontPage.jsx')
];
}

5.3 speed-measure-webpack-plugin

统计编译过程中,各loaderplugin使用的时间

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const SpeedMeasurePlugin = require("speed-measure-webpack-plugin");

const smp = new SpeedMeasurePlugin();

const webpackConfig = {
plugins: [
new MyPlugin(),
new MyOtherPlugin()
]
}
module.exports = smp.wrap(webpackConfig);

支持一下
扫一扫,支持poetries