search
HomeWeb Front-endJS TutorialHow to solve the problem that the files after webpack packaging are too large

本文主要和大家介绍了webpack打包之后的文件过大的解决方法,小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看看吧,希望能帮助到大家。

以前一直使用 create-react-app 这个脚手架进行 react 开发,后面因为一些自定义的配置,转而使用 webpack 搭建一套自己的脚手架。但是在使用 webpack 打包之后发现,纳尼?怎么文件这么大??? 于是研究了一下如何处理 webpack 打包之后文件太大的情况,简单记录下来。

首先配置全局变量

首先,通过指定环境,告诉 webpack 我们当前处于 production 环境中,要按照 production 的方式去打包。

//指定环境,将process.env.NODE_ENV环境与library关联
 new Webpack.DefinePlugin({
 'process.env.NODE_ENV': JSON.stringify('production'),
 }),

优化 devtool 中的 source-map .

dev-tool 提供了很多种选项,用来增强我们 debug 的能力,我们熟知的有: source-map , inline-source-map , cheap-source-map 等等。详细的用法可以参考Devtool官方文档,Devtool配置对比 , webpack sourcemap 选项多种模式的一些解释 , https://webpack.github.io/docs/configuration.html#devtool 如果你的文件在打包之后突然变成好几M,那么不用想,肯定是因为 source-map 的原因。 source-map 在开发阶段确实很好用,调试起来很方便,但是在生产环境下就没必要部署了。 建议在 prod 环境下关闭 source-map 。

剥离css文件,单独打包

安装 webpack 插件 extract-text-webpack-plugin 。 npm install extract-text-webpack-plugin --save-dev 。 使用方法:

plugins:[
 new ExtractTextPlugin('static/css/styles.[contenthash].css'),
]

这里使用了 contenthash , webpack 会根据内容去生成 hash 值。

使用 UglifyJSPlugin 压缩。

通过 UglifyJSPlugin 可以压缩我们的 *.js 文件。 安装方法: npm install uglifyjs-webpack-plugin --save-dev 。 用法: UglifyJSPlugin详细用法

const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
module.exports = {
 plugins: [
   new UglifyJSPlugin({
      parallel: 4,
      uglifyOptions: {
        output: {
          comments: false,
          beautify: false,
        },
        compress: {
          warnings: false
        },
      },
      cache: true,
    }),
 ]
}

提取公共依赖

使用 CommonsChunkPlugin 插件,将多个 js 文件进行提取,建立一个独立的文件。这个文件包含一些共用模块,浏这样览器只在刚开始的时候加载一次,便缓存起来供后续使用。而不用每次访问一个新界面时,再去加载一个更大的文件。

entry:{
 app:'./entry',
 vendor:['react','other-lib'],
 },
 plugins:[
 new Webpack.optimize.CommonsChunkPlugin({
   name: 'vendor',
 }),
 ]

开启gzip压缩

我们使用 compression-webpack-plugin 插件进行压缩。 安装: npm install compression-webpack-plugin --save-dev 。 compression-webpack-plugin 详细用法 使用:

const CompressionPlugin = require("compression-webpack-plugin");
plugins:[
new CompressionPlugin({
 asset: '[path].gz[query]', //目标资源名称。[file] 会被替换成原资源。[path] 会被替换成原资源路径,[query] 替换成原查询字符串
   algorithm: 'gzip',//算法
   test: new RegExp(
     '\\.(js|css)$'  //压缩 js 与 css
   ),
   threshold: 10240,//只处理比这个值大的资源。按字节计算
   minRatio: 0.8//只有压缩率比这个值小的资源才会被处理
})
]

压缩结果:

开启html压缩,自动添加上面生成的静态资源

添加插件 html-webpack-plugin

安装: npm install html-webpack-plugin --save-dev 用法:

plugins:[
 new HtmlWebpackPlugin({
   title: '',
     template: __dirname + '/../public/index.html',
     minify: {
       removeComments: true,
       collapseWhitespace: true,
       removeRedundantAttributes: true,
       useShortDoctype: true,
       removeEmptyAttributes: true,
       removeStyleLinkTypeAttributes: true,
       keepClosingSlash: true,
       minifyJS: true,
       minifyCSS: true,
       minifyURLs: true,
     },
     chunksSortMode:'dependency'
   }),
]

相关推荐:

webpack打包koa2框架app实例详解

vue-cli快速构建vue应用并实现webpack打包详解

webpack打包器的简单介绍

The above is the detailed content of How to solve the problem that the files after webpack packaging are too large. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
From Websites to Apps: The Diverse Applications of JavaScriptFrom Websites to Apps: The Diverse Applications of JavaScriptApr 22, 2025 am 12:02 AM

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python vs. JavaScript: Use Cases and Applications ComparedPython vs. JavaScript: Use Cases and Applications ComparedApr 21, 2025 am 12:01 AM

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

The Role of C/C   in JavaScript Interpreters and CompilersThe Role of C/C in JavaScript Interpreters and CompilersApr 20, 2025 am 12:01 AM

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.

JavaScript in Action: Real-World Examples and ProjectsJavaScript in Action: Real-World Examples and ProjectsApr 19, 2025 am 12:13 AM

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.

JavaScript and the Web: Core Functionality and Use CasesJavaScript and the Web: Core Functionality and Use CasesApr 18, 2025 am 12:19 AM

The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.

Understanding the JavaScript Engine: Implementation DetailsUnderstanding the JavaScript Engine: Implementation DetailsApr 17, 2025 am 12:05 AM

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python vs. JavaScript: The Learning Curve and Ease of UsePython vs. JavaScript: The Learning Curve and Ease of UseApr 16, 2025 am 12:12 AM

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python vs. JavaScript: Community, Libraries, and ResourcesPython vs. JavaScript: Community, Libraries, and ResourcesApr 15, 2025 am 12:16 AM

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools