WebPack 3:我为什么要得到:您可能需要一个适当的加载程序来处理此文件类型

Question

我正在尝试为我的angularjs应用程序创建WebPack构建。我不断得到：

ERROR in ./client/app/app.scss
Module parse failed: Unexpected character '@' (1:0)
You may need an appropriate loader to handle this file type.
| @import "common/common";
| 
| .app {
 @ ./client/app/app.scss 4:14-37
 @ ./client/app/app.component.js
 @ ./client/app/app.js
 @ multi (webpack)-dev-server/client?http://localhost:9000 ./client/app/app.js

重复几次此类型的错误...

我正在尝试使用dllReference插件，这是我的应用。配置：

var path = require("path");
var webpack = require("webpack");
module.exports = {
  devServer: {
    contentBase: path.join(__dirname, "build"),
    compress: true,
    port: 9000
  },
  node: {
    fs: 'empty'
  },
  cache: true,
  devtool: "eval", //or cheap-module-eval-source-map
  entry: {
    app: path.join(__dirname, "client/app", "app.js")
  },
  output: {
    path: path.join(__dirname, "build"),
    filename: "newapp.js",
    chunkFilename: "[name].js"
  },
  plugins: [
    //Typically you'd have plenty of other plugins here as well
    new webpack.DllReferencePlugin({
      context: path.join(__dirname, "client"),
      manifest: require("./build/vendor-manifest.json")
    }),
  ],
  module: {
    loaders: [
      {
        test: /.js?$/,
        loader: "babel-loader",
        include: [
          path.join(__dirname, "client") //important for performance!
        ],
        query: {
          cacheDirectory: true, //important for performance
          plugins: ["transform-regenerator"],
          presets: ["es2015", "stage-0"]
        }
      },
      { test: /.(scss|sass)$/, loader: 'style-loader' },
      { test: /.html$/, loader: 'raw-loader' },
      { test: /.css$/, loader: 'css-loader' }
    ]
  },
  resolve: {
    extensions: [".js"]
  }
};

和我的dll.config：

var path = require("path");
var webpack = require("webpack");
module.exports = {
  entry: {
    dependencies: ["angular","lodash","style-loader","sass-loader","fs","fs-walk","node-sass","css-loader"],
  },
  node: {
    fs: 'empty'
  },
  output: {
    filename: 'vendor.bundle.js',
    path: '/Users/dimitri/NG6-starter/build',
    library: 'vendor_lib',
  },
  plugins: [new webpack.DllPlugin({
    name: 'vendor_lib',
    path: 'build/vendor-manifest.json',
  })]
};

如何解决此类错误？

Answer 1

您当前仅指定加载SASS文件的style-loader。您将需要包括css-loader和sass-loader。

{
  test: /.(scss|sass)$/,
  loader: ['style-loader', 'css-loader', 'sass-loader']
}

style-loader：从JS字符串创建样式节点

css-loader：将CSS转换为commonjs

sass-loader：将SASS编译到CSS

注意：不要忘记使用npm install --save sass-loader