Webpack案例学习

注：本来自己是打算学习一下requirejs的，结果从社区了解到Webpack的功能更强大而且更好用，就搜索到了篇文章。

本文是照着阮一峰老师的demo进行的练习。详见https://github.com/ruanyf/webpack-demos。这些列子都写得很简单明了，让我学习起来感觉轻松不少！

Webpack要怎么才能使用

1、首先必须要安装node，npm这些环境工具啦！

2、其次要安装Webpack和webpack-dev-server:

$ npm install webpack webpack-dev-server

3、然后clone这个.git到本地，到各个目录项并启动webpack-dev-server:

$ git clone git@github.com:ruanyf/webpack-demos.git
$ cd webpack-demos
$ npm install

然后你就可以在浏览器 http://127.0.0.1:8080 中看到页面了。

再进一步：webpack到底是什么？

Webpack是一个和grunt/gulp相似的前端构建系统，

Webpack可以用来像browserify那样进行前端模块儿话构建，但是，Webpack要更强大。

Webpack的配置文件是webpack.config.js:

// webpack.config.js
module.exports = {
entry: './main.js',
output: {
filename: 'bundle.js'
}
};

配置文件弄好了，就可以直接启动Webpack了

$ webapck

上面展示的是无参数启动，下面这些参数是需要知道的：

webpack – for building once for development

webpack -p – for building once for production (minification)

webpack –watch – for continuous incremental build

webpack -d – to include source maps

webpack –colors – for making things pretty

To produce a production ready application, you could write scripts field in your package.json file as following.

// package.json
{
// ...
"scripts": {
"dev": "webpack-dev-server --devtool eval --progress --colors",
"deploy": "NODE_ENV=production webpack -p"
},
// ...
}

目录

Entry file

Multiple entry files

Babel-loader

CSS-loader

Image loader

CSS Module

UglifyJs Plugin

HTML Webpack Plugin and Open Browser Webpack Plugin

Environment flags

Code splitting

Code splitting with bundle-loader

Common chunk

Vendor chunk

Exposing Global Variables

Hot Module Replacement

React router

Entry file