npm init一路回车即可！最终会生成package.json文件，如下所示：
{
"name": "webpack-starter",
"version": "1.0.0",
"description": "``` bash\r npm init\r ```\r 一路回车即可！最终会生成package.json文件，如下所示：\r ``` json",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"repository": {
"type": "git",
"url": "git+https://github.com/swimly/webpack-starter.git"
},
"author": "",
"license": "ISC",
"bugs": {
"url": "https://github.com/swimly/webpack-starter/issues"
},
"homepage": "https://github.com/swimly/webpack-starter#readme"
}接下来全局安装webpack。
npm i -g webpack // 已安装的跳过在该项目安装webpack
npm i -D webpackpackage.json:
"devDependencies": {
"webpack": "^2.3.2"
}创建如下目录结构：
+ src
- app.js
+ dist
package.json
app.js
console.log('hello from app.js')到此就可以用webpack进行简单的打包
webpack ./src/app.js ./dist/app.bundle.jswebpack ./src/app.js ./dist/app.bundle.js
Hash: 59e49fa6a143615fafca
Version: webpack 2.3.2
Time: 64ms
Asset Size Chunks Chunk Names
app.bundle.js 2.66 kB 0 [emitted] main
[0] ./src/app.js 32 bytes {0} [built]webpack ./src/app.js ./dist/app.bundle.js -p //打包出来的文件被压缩处理webpack ./src/app.js ./dist/app.bundle.js -p --watch //打包出来的文件被压缩处理,并且实时监听文件的变化这时候就可以看到dist目录下会生成一个app.bundle.js文件，呃，如果每次都这样打包，那这样还有什么乐趣可言。
接下来在根目录创建webpack.config.js
module.exports = {
entry: './src/app.js',
output: {
filename: './dist/app.bundle.js'
}
}接下来在终端输入：
webpack就这么简单就可以进行项目打包。 修改package.json文件如下所示：
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"dev": "webpack -d --watch" //这条是添加的
}这时候我们只用在终端输入
npm run dev就可以实时监听项目并且打包了！ 当然开发时候是这样，实际项目打包我们还需要如下：
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"dev": "webpack -d --watch",
"prod": "webpack -p"
},在dist目录中创建 index.html，并且引入打包好的js文件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<p>content goes here</p>
<script src="./app.bundle.js"></script>
</body>
</html>不出意外就会看到如下的页面！
当然，如果我们不想自己手动去在dist目录创建html文件，这时候就可以利用webpack的plugin来帮我们创建。
npm i html-webpack-plugin --save-dev修改webpack.config.js如下所示，并且删除dist目录的index.html.
var HtmlWebpackPlugin = require('html-webpack-plugin');
var path = require('path')
module.exports = {
entry: './src/app.js',
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'app.bundle.js'
},
plugins: [new HtmlWebpackPlugin()]
}然后再次运行
npm run dev这时候你会看到dist目录里面已经自动生成一个index.html文件
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Webpack App</title>
</head>
<body>
<script type="text/javascript" src="app.bundle.js"></script></body>
</html>如果我们想要根据自己的模板来创建html呢，修改webpack.config.js如下所示：
var HtmlWebpackPlugin = require('html-webpack-plugin');
var path = require('path')
module.exports = {
entry: './src/app.js',
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'app.bundle.js'
},
plugins: [
new HtmlWebpackPlugin({
title: 'myApp',
minify: {
collapseWhitespace: true //生成被压缩的html文件
},
hash: true,
template: './src/index.html', // Load a custom template (ejs by default see the FAQ for details)
})
]
}在src目录添加index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title><%= htmlWebpackPlugin.options.title %></title>
</head>
<body>
<p>This is my template</p>
</body>
</html>这时候再次打包，会根据我们创建的模板来生成html文件。
npm install css-loader style-loader --save-dev在src目录新建app.css
html,body{
height:100%;
margin:0;
background:green;
color:#fff;
font-size:20px;
}修改webpack.config.js添加如下
module: {
rules: [
{test: /\.css$/, loaders: 'style-loader!css-loader'}
// {test: /\.css$/, use: ['style-loader', 'css-loader']}
]
},修改app.js
import './app.css'
console.log('hello from app.js again')npm install --save-dev sass-loader node-sass修改webpack.config.js
module: {
rules: [
{test: /\.css$/, use: ['style-loader', 'css-loader']},
{test: /\.scss$/, use: ['style-loader', 'css-loader', 'sass-loader']}
]
},修改app.js
import './main.scss'
console.log('hello from app.js again')在src目录新建main.scss
body{background:#ff0;}
npm install --save-dev extract-text-webpack-plugin修改webpack.config.js
var HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require("extract-text-webpack-plugin");
var path = require('path')
module.exports = {
entry: './src/app.js',
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'app.bundle.js'
},
module: {
rules: [
{test: /\.css$/, use: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: ['css-loader']
})},
{test: /\.scss$/, use: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: ['css-loader', 'sass-loader']
})}
]
},
plugins: [
new ExtractTextPlugin({
filename: (getPath) => {
return getPath('css/[name].css').replace('css/js', 'css');
},
allChunks: true
}),
new HtmlWebpackPlugin({
title: 'myApp',
minify: {
collapseWhitespace: true //生成被压缩的html文件
},
hash: true,
template: './src/index.html', // Load a custom template (ejs by default see the FAQ for details)
})
]
}详情请参考：https://www.npmjs.com/package/extract-text-webpack-plugin
npm i webpack-dev-server -D修改package.json如下：
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"dev": "webpack-dev-server", // 这里是刚修改的
"prod": "webpack -p"
},然后
npm run dev就可以启动这个服务器了！
修改webpack.config.js，添加如下
devServer: {
contentBase: path.join(__dirname, 'dist'),
compress: true,
port: 8080,
stats: 'errors-only',
open: true // 启动后自动打开浏览器窗口
},rimraf清理项目
npm i -D rimrafpackage.json修改如下：
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"dev": "webpack-dev-server",
"prod": "npm run clean && webpack -p",
"clean": "rimraf ./dist/*"
}这样的话会在每次打包的时候将dist目录清空，然后重新生成，以确保dist目录没有多余的无用文件。 一般情况一个项目肯定不止一个页面吧，解析来创建contact模块，修改webpack.config.js,在plugins中添加：
new HtmlWebpackPlugin({
title: 'contact',
hash: true,
filename: 'contact.html',
template: './src/contact.html'
})并且在src根目录创建一个新的hmtl模板contact.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title><%= htmlWebpackPlugin.options.title %></title>
</head>
<body>
<p>This is contact!</p>
</body>
</html>在src根目录新增contact.js
console.log('contact page')由于有多个入口文件，修改webpack.config.js的entry和output
entry: {
app: './src/app.js',
contact: './src/contact.js'
},
output: {
path: path.resolve(__dirname, 'dist'),
filename: '[name].bundle.js'
},
new HtmlWebpackPlugin({
title: 'myApp',
hash: true,
filename: './index.html',
excludeChunks: ['contact'], //新增
template: './src/index.html',
}),
new HtmlWebpackPlugin({
title: 'contact',
hash: true,
filename: 'contact.html',
chunks: ['contact'], //新增
template: './src/contact.html'
})
自动生成html文件可以用html作为模板，除此之外我们还可以写jade语法，这个就需要利用pug了。 我们把src/index.html改成index.pug
doctype html
html(lang="en")
head
title= pageTitle
script(type='text/javascript').
if (foo) bar(1 + 5)
body
h1 Pug - node template engine
#container.col
if youAreUsingPug
p You are amazing
else
p Get on it!
p.
Pug is a terse and simple templating language with a
strong focus on performance and powerful features.webpack.config.js
new HtmlWebpackPlugin({
title: 'myApp',
// minify: {
// collapseWhitespace: true //生成被压缩的html文件
// },
hash: true,
filename: './index.html',
excludeChunks: ['contact'],
template: './src/index.pug', // Load a custom template (ejs by default see the FAQ for details)
}),
{test: /\.pug$/, use: 'pug-html-loader'}
<h1>this is the header</h1>修改index.pug
doctype html
html(lang="en")
head
title= pageTitle
script(type='text/javascript').
if (foo) bar(1 + 5)
body
include includes/header.pug // 新增
h1 Pug - node template engine
#container.col
if youAreUsingPug
p You are amazing
else
p Get on it!
p.
Pug is a terse and simple templating language with a
strong focus on performance and powerful features.
伴随这项目越来越庞大，每次保存，项目都会重新打包并且自动刷新页面，虽说这样已经很爽了，但是中间那段枯燥无味的等待你是否受得了。记得刚开始接触局部刷新这个词是从ajax开始的，现在就来体验一把在开发过程中的页面局部刷新给你带来的快感。 修改我们的webpack.config.js
// 页面上面加上webpack的引用
var webpack = require('webpack')
// 在devServer加上
hot: true,
// 在plugin中加上如下两句：
new webpack.HotModuleReplacementPlugin(),
new webpack.NamedModulesPlugin()
//module改成如下：
rules: [
{test: /\.css$/, use: ['style-loader', 'css-loader']},
{test: /\.scss$/, use: ['style-loader', 'css-loader', 'sass-loader']},
{test: /\.pug$/, use: ['html-loader', 'pug-html-loader']}
]具体参考： https://webpack.js.org/guides/hmr-react/
最终的webpack.config.js如下所示：
var HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require("extract-text-webpack-plugin");
var path = require('path')
var webpack = require('webpack')
module.exports = {
entry: {
app: './src/app.js',
contact: './src/contact.js'
},
output: {
path: path.resolve(__dirname, 'dist'),
filename: '[name].bundle.js'
},
module: {
rules: [
{test: /\.css$/, use: ['style-loader', 'css-loader']},
{test: /\.scss$/, use: ['style-loader', 'css-loader', 'sass-loader']},
{test: /\.pug$/, use: ['html-loader', 'pug-html-loader']}
]
},
devServer: {
contentBase: path.join(__dirname, 'dist'),
compress: true,
port: 8080,
stats: 'errors-only',
hot: true,
open: true // 启动后自动打开浏览器窗口
},
plugins: [
new ExtractTextPlugin({
filename: (getPath) => {
return getPath('css/[name].css').replace('css/js', 'css');
},
disable: true,
allChunks: true
}),
new HtmlWebpackPlugin({
title: 'myApp',
// minify: {
// collapseWhitespace: true //生成被压缩的html文件
// },
hash: true,
filename: './index.html',
excludeChunks: ['contact'],
template: './src/index.pug', // Load a custom template (ejs by default see the FAQ for details)
}),
new HtmlWebpackPlugin({
title: 'contact',
hash: true,
filename: 'contact.html',
chunks: ['contact'],
template: './src/contact.html'
}),
new webpack.HotModuleReplacementPlugin(),
new webpack.NamedModulesPlugin()
]
}这时候再启动项目
修改package.json
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"dev": "webpack-dev-server",
"prod": "npm run clean && NODE_ENV=production webpack -p",
"clean": "rimraf ./dist/*"
},webpack.config.js
var HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require("extract-text-webpack-plugin");
var path = require('path')
var webpack = require('webpack')
var isProd = process.env.NODE_ENV = 'production';
var cssDev = ['style-loader', 'css-loader', 'sass-loader'];
var cssProd = ExtractTextPlugin.extract({
fallback: 'style-loader',
loader: ['css-loader', 'sass-loader'],
publicPath: '/dist'
})
var cssConfig = isProd ? cssProd : cssDev;
module.exports = {
entry: {
app: './src/app.js',
contact: './src/contact.js'
},
output: {
path: path.resolve(__dirname, 'dist'),
filename: '[name].bundle.js'
},
module: {
rules: [
{test: /\.css$/, use: ['style-loader', 'css-loader']},
{test: /\.scss$/, use: cssConfig},
{test: /\.pug$/, use: ['html-loader', 'pug-html-loader']}
]
},
devServer: {
contentBase: path.join(__dirname, 'dist'),
compress: true,
port: 8080,
stats: 'errors-only',
hot: true,
open: true // 启动后自动打开浏览器窗口
},
plugins: [
new ExtractTextPlugin({
filename: (getPath) => {
return getPath('css/[name].css').replace('css/js', 'css');
},
disable: !isProd,
allChunks: true
}),
new HtmlWebpackPlugin({
title: 'myApp',
// minify: {
// collapseWhitespace: true //生成被压缩的html文件
// },
hash: true,
filename: './index.html',
excludeChunks: ['contact'],
template: './src/index.pug', // Load a custom template (ejs by default see the FAQ for details)
}),
new HtmlWebpackPlugin({
title: 'contact',
hash: true,
filename: 'contact.html',
chunks: ['contact'],
template: './src/contact.html'
}),
new webpack.HotModuleReplacementPlugin(),
new webpack.NamedModulesPlugin()
]
}这时候
npm run prod
//会出现如下错误：
'NODE_ENV' 不是内部或外部命令，也不是可运行的程序
或批处理文件。一般如果你是mac，这样写是没有问题的，如果你是跟小编一样的穷逼还用着windows系统这样可就行不通了。
npm install --save-dev cross-env然后修改package.json
"prod": "npm run clean && cross-env NODE_ENV=production webpack -p",
最终webpack.config.js如下所示：
var HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require("extract-text-webpack-plugin");
var path = require('path')
var webpack = require('webpack')
var isProduction = process.env.NODE_ENV === 'production';
var scssDev = ['style-loader', 'css-loader', 'sass-loader'];
var cssDev = ['style-loader', 'css-loader'];
var scssProd = ExtractTextPlugin.extract({
fallback: 'style-loader',
loader: ['css-loader', 'sass-loader'],
publicPath: '/dist'
});
var cssProd = ExtractTextPlugin.extract({
fallback: 'style-loader',
loader: ['css-loader'],
publicPath: '/dist'
});
var scssConfig = isProduction ? scssProd : scssDev;
var cssConfig = isProduction ? cssProd : cssDev;
module.exports = {
entry: {
app: './src/app.js',
contact: './src/contact.js'
},
output: {
path: path.resolve(__dirname, 'dist'),
filename: '[name].bundle.js'
},
module: {
rules: [
{test: /\.css$/, use: cssConfig},
{test: /\.scss$/, use: scssConfig},
{test: /\.pug$/, use: ['html-loader', 'pug-html-loader']}
]
},
devServer: {
contentBase: path.join(__dirname, 'dist'),
compress: true,
port: 8080,
stats: 'errors-only',
hot: true,
open: true // 启动后自动打开浏览器窗口
},
plugins: [
new ExtractTextPlugin({
filename: (getPath) => {
return getPath('css/[name].css').replace('css/js', 'css');
},
disable: !isProduction,
allChunks: true
}),
new HtmlWebpackPlugin({
title: 'myApp',
// minify: {
// collapseWhitespace: true //生成被压缩的html文件
// },
hash: true,
filename: './index.html',
excludeChunks: ['contact'],
template: './src/index.pug', // Load a custom template (ejs by default see the FAQ for details)
}),
new HtmlWebpackPlugin({
title: 'contact',
hash: true,
filename: 'contact.html',
chunks: ['contact'],
template: './src/contact.html'
}),
new webpack.HotModuleReplacementPlugin(),
new webpack.NamedModulesPlugin()
]
}最终效果如下：
npm i -D file-loader
// add
{test: /\.jpg$/, use: 'file-loader'}然后你就可以像往常一样随便的引入图片！ 在html中要按如下使用：
<img src="<%= require('./img/bg.jpg')%>" alt="">npm i -D image-webpack-loader
{
test: /\.(png|jpe?g|svg|gif|webp)$/,
use: [
'file-loader?name=images/[name].[ext]',
// 'file-loader?name=[hash:6].[ext]&publicPath=images/',
'image-webpack-loader?{optimizationLevel: 7, interlaced: false, pngquant:{quality: "65-90", speed: 4}, mozjpeg: {quality: 65}}'
]
}具体参考：https://www.npmjs.com/package/image-webpack-loader
npm i -D babel babel-preset-es2015 babel-loader babel-core//add
{
test: /\.js$/,
use: 'babel-loader',
exclude: /node_modules/
},在根目录新增.babelrc文件
{
"presets": ["es2015"]
}现在我们就可以肆无忌惮的写es6的语法了！