How to retain @ charset or not compile Unicode

[laozei6401]

keep charset or not compile Unicode

I want to add Chinese to CSS, but sass loader deleted @ charset and compiled Unicode into Chinese. I've been looking for it for many days and I don't know how to solve it. I want to ask how to solve this problem here

When I remove sass loader, it's what I wan

The webpack config

const path = require("path");
const fs = require("fs");

const { CleanWebpackPlugin } = require("clean-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

const isEnvDevelopment = process.env.NODE_ENV === "development";
const isEnvProduction = process.env.NODE_ENV === "production";

function resolve(dir) {
  return path.resolve(__dirname, dir);
}

/**
 * @type import('webpack').Configuration
 */
module.exports = {
  mode: isEnvDevelopment ? "development" : "production",
  devtool: isEnvDevelopment ? "cheap-module-eval-source-map" : false,
  entry: {
    app: resolve("./src"),
  },
  output: {
    path: path.resolve("dist"),
    publicPath: "/",
    hashDigestLength: 10,
    filename: "js/[name].[contenthash].js",
    chunkFilename: "js/[name].[contenthash].js",
  },
  optimization: {
    runtimeChunk: "single",
  },
  module: {
    rules: [
      {
        test: /\.s?css$/,
        use: [MiniCssExtractPlugin.loader, "css-loader", "sass-loader"],
      },
    ],
  },
  plugins: [
    isEnvProduction && new CleanWebpackPlugin(),
    isEnvProduction &&
      new MiniCssExtractPlugin({
        filename: "css/[name].[hash].css",
        chunkFilename: "css/[name].[contenthash].css",
      }),
  ].filter(Boolean),
};

scss code

@charset "UTF-8";

/*
 * 测试一波
 */

body ::before {
  content: "\6d4b\8bd5\4e00\6ce2";
  display: flex;
}

If anybody has any suggestions at all, I would greatly appreciate it. I know there's been other issues posted with similar errors, but I feel that I've tried all the provided "solutions" and literally nothing has worked for me thus far. I'm absolutely willing to provide more code if need be, or to answer other questions about my setup. Really at my wits' end!

[jathak]

Dart Sass currently always outputs UTF-8, so your escaped unicode is converted here. See #568, which tracks support for an --ascii-only flag.