• 首先将favicon.ico图片放在根目录下，通过以下方法使其显示正确：

1. 修改webpack配置文件 --- webpack.dev.conf.js 与 webpack.prod.conf.js

  // webpack.dev.conf.js文件
  new HtmlWebpackPlugin({
      filename: 'index.html',
      template: 'index.html',
      inject: true,
      favicon: path.resolve('favicon.ico')  // 新增
   }),

  // webpack.prod.conf.js文件
  new HtmlWebpackPlugin({
      filename: config.build.index,
      template: 'index.html',
      inject: true,
      favicon: path.resolve('favicon.ico'),   // 新增
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      },
      // necessary to consistently work with multiple chunks via CommonsChunkPlugin
      chunksSortMode: 'dependency'
  }),

注意： 修改配置文件后需重启 npm run dev