1. 引入图标
在vue项目中的index.html中引入图标，为防止项目打包时图片路径出错，需把icon图标放在static静态文件夹下

<link rel="shortcut icon" href="./static/logo.ico" type="image/x-icon"  />

2.新增(修改)代码块
①.build文件夹下的webpack.dev.conf.js文件修改如下：

源码如下：

  plugins: [
    new webpack.DefinePlugin({
      'process.env': require('../config/dev.env')
    }),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NamedModulesPlugin(), // HMR shows correct file names in console on update.
    new webpack.NoEmitOnErrorsPlugin(),
    // https://github.com/ampedandwired/html-webpack-plugin
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: 'index.html',
      inject: true,
      favicon: path.resolve('./static/logo.ico')
    }),
    // copy custom static assets
    new CopyWebpackPlugin([
      {
        from: path.resolve(__dirname, '../static'),
        to: config.dev.assetsSubDirectory,
        ignore: ['.*']
      }
    ])
  ]

②.build文件夹下的webpack.prod.conf.js文件修改如下：

源码如下：

    new HtmlWebpackPlugin({
      filename: config.build.index,
      template: 'index.html',
      inject: true,
      favicon: path.resolve('./static/logo.ico'),
      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'
    }),

3.最后重启项目即可