Webpack 4 文件加载器将 svg 文件内容更改为 __webpack_public_path__

Question

我有一个使用 Webpack 4 的项目。我使用文件加载器来处理 html 中的图像和样式中的字体。但对于图像，文件加载器在 dist 文件夹中创建图像，但放置“module.exports = __webpack_public_path__ +“assets/fonts/main-logo.svg”;” 字符串在其中。所以我可以在 html 中看到正确的路径，但看不到图像。这是我的 webpack 文件：

webpack.common.js

    const path = require('path');

module.exports = {

  entry: "./src/index.js",
  module: {
    rules: [

      {
        test: /\.html$/,
        use: ["html-loader"]
      },
      {
        test: /\.(svg|png|jpg|gif)$/,
        use: {
          loader: "file-loader",
          options: {
            esModule: false,
            name: "[name].[ext]",
            outputPath: "assets/images"
          }
        }
      },
      {
        test: /\.(woff(2)?|ttf|eot|svg)([\?]?.*)?$/,
        exclude: /node_modules/,
        use: {
          loader: "file-loader",
          options: {
            esModule: false,
            name: "[name].[ext]",
            outputPath: "assets/fonts"
          }
        }
      }
    ]
  }
}

这是开发环境的webpack.dev.js文件。

const common = require('./webpack.common');
const merge = require('webpack-merge');
const path = require('path');
const HtmlWebPackPlugin = require('html-webpack-plugin');


module.exports = merge(common, {
  mode: "development",
  output:  {
    filename: "main.js",
    path: path.resolve(__dirname, "dist")
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: "./src/template.html"
    })
  ],
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: ["style-loader", "css-loader", "sass-loader"]
      }
    ]
  }
});

Answer 1

.svg您正在使用同一加载程序测试两个规则中具有扩展名的文件。

如果您打算输出 SVG，assets/fonts您应该从图像文件测试中删除扩展名：

const path = require('path');

module.exports = {

  entry: "./src/index.js",
  module: {
    rules: [

      {
        test: /\.html$/,
        use: ["html-loader"]
      },
      {
        test: /\.(png|jpg|gif)$/,
        use: {
          loader: "file-loader",
          options: {
            esModule: false,
            name: "[name].[ext]",
            outputPath: "assets/images"
          }
        }
      },
      {
        test: /\.(woff(2)?|ttf|eot|svg)([\?]?.*)?$/,
        exclude: /node_modules/,
        use: {
          loader: "file-loader",
          options: {
            esModule: false,
            name: "[name].[ext]",
            outputPath: "assets/fonts"
          }
        }
      }
    ]
  }
}

否则，如果您想将 SVG 输出为assets/images，您应该从字体测试中删除扩展名：

const path = require('path');

module.exports = {

  entry: "./src/index.js",
  module: {
    rules: [

      {
        test: /\.html$/,
        use: ["html-loader"]
      },
      {
        test: /\.(svg|png|jpg|gif)$/,
        use: {
          loader: "file-loader",
          options: {
            esModule: false,
            name: "[name].[ext]",
            outputPath: "assets/images"
          }
        }
      },
      {
        test: /\.(woff(2)?|ttf|eot)([\?]?.*)?$/,
        exclude: /node_modules/,
        use: {
          loader: "file-loader",
          options: {
            esModule: false,
            name: "[name].[ext]",
            outputPath: "assets/fonts"
          }
        }
      }
    ]
  }
}