Webpack 打包 - 10. 压缩CSS

使用 optimize-css-assets-webpack-plugin 插件压缩 CSS文件。

 1.文件结构

 

 2.安装 optimize-css-assets-webpack-plugin (根据自己环境安装合适的版本)

$ npm i postcss-loader@3.0.0 postcss-preset-env@6.7.0 -D

3. a.css

#box1 {
    width: 100px;
    height: 100px;
    background-color: pink;
    display: flex;
    backface-visibility: hidden;
}

 

b.css

#box2 {
    width: 200px;
    height: 200px;
    background-color: deeppink;
}

 

index.js

import '../css/a.css';
import '../css/b.css';

 

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>webpack</title>
</head>
<body>
<div id="box1"></div>
<div id="box2"></div>
</body>
</html>

 

webpack.config.js

const {resolve} = require('path')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const OptimizeCssAssetsWebpackPlugin = require('optimize-css-assets-webpack-plugin')

//设置 nodejs 环境变量
// process.env.NODE_ENV = 'development'

module.exports = {
    entry: './src/js/index.js',
    output: {
        filename: "js/built.js",
        path: resolve(__dirname, 'build')
    },
    module: {
        rules: [
            {
                test: /\.css$/,
                use: [
                    MiniCssExtractPlugin.loader,
                    'css-loader',
                    {
                        loader: "postcss-loader",
                        // 修改loader的配置
                        options: {
                            ident: 'postcss',
                            plugins: () => [
                                //postcss 的插件
                                require('postcss-preset-env')()
                            ]
                        }
                    }
                ]
            }
        ]
    },
    plugins: [
        new HtmlWebpackPlugin({
            template: "./src/index.html"
        }),
        new MiniCssExtractPlugin({
            filename: 'css/built.css'
        }),
        // 压缩css
        new OptimizeCssAssetsWebpackPlugin()
    ],
    mode: "development"
}

 

4.打包

$ webpack

 

5.

 

 生成的 built.css 文件已经被压缩

 

 

end~

 

posted @ 2022-09-08 14:27  Evengod  阅读(423)  评论(0)  编辑  收藏  举报