在 webpack 中使用 mini-css-extract-plugin 输出 2 个（或更多）.css 文件

Question

使用 webpack 2（或 3）时，我可以编写如下代码：

const coreStyles = new ExtractTextPlugin('./styles/core.bundle.css');
const componentStyles = new ExtractTextPlugin('./styles/components.bundle.css');

rules: [
{
   test: /\.scss$|\.css$/,
   include: path.resolve(__dirname, './styles/App.scss'),
   use: coreStyles.extract({
       use: ['css-loader', 'sass-loader']
   })
},
{
   test: /\.scss$|\.css$/,
   exclude: path.resolve(__dirname, './styles/App.scss'),
   use: componentStyles.extract({
       use: ['css-loader', 'sass-loader']
   })
}
]

结果，我在输出中得到了 2 个 css 文件。

如何使用mini-css-extract-plugin 达到同样的效果？根据文档，我只能指定一个文件名：

plugins: [
    new MiniCssExtractPlugin({
        filename: "[name].css",
    })
]

谢谢。

Answer 1

这个例子也符合 SCSS 并且不使用 MiniCssExtractPlugin

在 Webpack 4.16.5 中，我首先安装了这 2 个包，以使其能够正常工作

npm install --save-dev file-loader
npm install --save-dev extract-loader

然后在你的 webpack.config.js 中

//const MiniCssExtractPlugin = require("mini-css-extract-plugin");

var path = require("path");

module.exports = {
    entry: ['./blocks.js', './block.editor.scss', './block.style.scss'],
    mode: 'production',//change to 'development' for non minified js
    output: {
        path: path.resolve(__dirname, "dist"),
        filename: 'blocks.build.js',
        publicPath: "/dist"
    },
    watch: true,
    module: {
        rules: [
            {
                test: /.js$/,
                loader: 'babel-loader',
                exclude: /node_modules/,
            },
            {
                test: /\.scss$/,
                use: [
                    {
                        loader: 'file-loader',
                        options: {
                            name: '[name].build.css',
                            context: './',
                            outputPath: '/',
                            publicPath: '/dist'
                        }
                    },
                    {
                        loader: 'extract-loader'
                    },
                    {
                        loader: 'css-loader',
                    },
                    {
                        loader: 'sass-loader',
                        options: {
                            sourceMap: true
                        }
                    }
                ]
            },
        ],
    },
};

这将输出以下结构

为了缩小 CSS 安装

npm install --save-dev uglifyjs-webpack-plugin
npm install --save-dev optimize-css-assets-webpack-plugin

添加到 webpack.config.js

const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");

var path = require("path");

module.exports = {
    //...
    watch: true,
    module: {
        rules: [
            //...
        ],
    },
    optimization: {
        minimizer: [
            new UglifyJsPlugin({
                cache: true,
                parallel: true,
                sourceMap: true // set to true if you want JS source maps
            }),
            new OptimizeCSSAssetsPlugin({})
        ]
    },
};

希望对你有帮助