前两篇文章说了webpack基础的模块使用和配置。本篇是webpack.config.js文件抽离。通俗来讲就是正式环境和开发环境使用不同的配置文件。主要分为3步
- 安装webpack-merge
- 创建多个配置文件，并且添加相应的代码
- 在package.json修改运行脚本
1、执行命令，安装webpack-merge到本地目录
npm install webpack-merge --save--dev
2、在项目根目录下新建build目录，并创建
- 公用js文件base.config.js
- 生产js文件prod.config.js
- 开发js文件dev.config.js
在生产和开发文件中引入base.config.js和webpack-merge，使用案例
const baseConfig = require('./base.config.js');
const webpackMerge = require('webpack-merge');
module.exports = webpackMerge.merge(baseConfig,{
devServer: {
contentBase: path.join(__dirname, "../dist"), //本地服务根文件
inline: true ,//实时刷新
port: 8080
}
})
3、在package.json中修改编译的文件
"scripts": {
"dev": "webpack-dev-server --open --config build/dev.config.js",
"build": "webpack --config build/prod.config.js",
},
项目结构：
image.png
完整的base.config.js代码
const HtmlWebpackPlugin = require('html-webpack-plugin');
const path = require('path');
//一旦依赖node 就npm init day07-webpack配置文件合并
//定义base运行目录
const baseBuildPath = "../dist";
module.exports = {
entry : './src/main.js', //入口文件
output : {
path : path.resolve(__dirname,baseBuildPath), //输出目录
filename : 'bundle.js' //输出文件名
},
mode: 'production',
resolve : {
//省略后缀名
extensions : ['.js','.css','.vue'],
alias : {
'@':path.join(__dirname,'./src'),//这样 @就表示根目录src这个路径
vue: 'vue/dist/vue.js',
}
},
module: {
rules: [
{
test: /\.m?js$/,
exclude: /(node_modules|bower_components)/,
use: {
loader: 'babel-loader',
options: {
presets: ['@babel/preset-env']
}
}
},
{
test: /\.vue$/,
loader: 'vue-loader',
// options:vueloaderOptions(isDev),
// exclude:/node_modules/
},
{
test: /\.css$/i,
use: ["style-loader", "css-loader"],
},
]
},
plugins: [
new HtmlWebpackPlugin({
template: "index.html"
})
]
}
完整的开发配置文件dev.config.js代码
/** 开发环境文件配置 **/
const baseConfig = require('./base.config.js');
const webpackMerge = require('webpack-merge');
const path = require('path')
//一旦依赖node 就npm init day07-webpack配置文件合并
module.exports = webpackMerge.merge(baseConfig,{
devServer: {
contentBase: path.join(__dirname, "../dist"), //本地服务根文件
inline: true ,//实时刷新
port: 8080
}
})
完整的生成环境prod.config.js代码
/** 生成环境文件配置 **/
//代码压缩
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const webpack = require('webpack');
const webpackMerge = require('webpack-merge');
const baseConfig = require('./base.config.js');
//一旦依赖node 就npm init day07-webpack配置文件合并
module.exports = webpackMerge.merge(baseConfig, {
plugins: [
new webpack.BannerPlugin("版本归test所有."),
new UglifyJsPlugin()
]
});
完整的package.json代码
{
"name": "day06",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"dev": "webpack-dev-server --open --config build/dev.config.js",
"build": "webpack --config build/prod.config.js",
"beizhu": "--mode=development"
},
"author": "",
"license": "ISC",
"devDependencies": {
"@babel/core": "^7.13.10",
"@babel/preset-env": "^7.13.10",
"babel-loader": "^8.2.2",
"css-loader": "^5.1.2",
"html-webpack-plugin": "^5.3.1",
"style-loader": "^2.0.0",
"uglifyjs-webpack-plugin": "^2.2.0",
"vue": "^2.6.12",
"vue-loader": "^14.1.1",
"vue-template-compiler": "^2.6.12",
"webpack-cli": "^3.3.2",
"webpack-dev-server": "^3.11.2",
"webpack-merge": "^5.7.3"
},
"dependencies": {
"vue": "^2.6.12"
}
}
