如何在 Webpack 上避免重复 sass 导入（使用@use）

Question

我的 sass 模块可以像下面这样相互导入。

// LinearLayout.scss
@mixin LinearLayout { ... }
linear-layout { @include LinearLayout; }

// ScrollView.scss
@use "LinearLayout" as *;
@mixin ScrollView {
    @include LinearLayout;
    ...
}
scroll-view { @include ScrollView; }

并且因为 each sass 模块通过在脚本中导入而最终出现在捆绑的 css 文件中，捆绑的 css 文件包含重复 css 个选择器。

如何删除重复项？

Answer 1

Webpack 5: css-minimizer-webpack-plugin
5 岁以下的 Webpack：optimize-css-assets-webpack-plugin

两个 Webpack 版本下的共同需求

mini-css-extract-plugin

我还没有深入了解这个，但似乎这两个插件都在特定的 webpack 捆绑生命周期中工作，该生命周期由 mini-css-extract-plugin 制定。所以你不能使用 style-loader, and the thing that was done by it can be done by html-webpack-plugin.

下面是您的 webpack.config.ts 的样子。请注意，您将 optimization.minimize 设置为 true 以使其运行也在开发中。

import type Webpack from "webpack";
import HtmlBundler from "html-webpack-plugin";
import CssExtractor from "mini-css-extract-plugin";

// webpack@5
import CssMinimizer from "css-minimizer-webpack-plugin";
// under webpack@5
import CssMinimizer from "optimize-css-assets-webpack-plugin";

const config: Webpack.Configuration = {
    ...
    plugins: [
        new HtmlBundler({
            template: "yourHtmlTemplate.html"
        });
        new CssExtractor({
            filename: "outputCssFilename.css",
        }),
    ],
    module: {
        rules: [
            {
                test: /\.s[ac]ss$/,
                use: [
                    CssExtractor.loader,
                    "css-loader",
                    "resolve-url-loader",
                    "sass-loader",
                ]
            },
        ],
    },
    optimization: {
        minimize: true, // set true to run minimizers also in development
        minimizer: [
            new CssMinimizer(),
        ],
    },
};

export default config;

如何在 Webpack 上避免重复 sass 导入（使用@use）

How to avoid duplicate sass imports(using @use) on Webpack

typescript

webpack

import

sass

sass-loader

两个 Webpack 版本下的共同需求