压缩代码

压缩css和压缩js是自带的，只有生产环境才会使用
压缩js

压缩css

压缩图片：

 {
        test: /\.(png|svg|jpg|gif|jpeg|ico)$/,
        use: [
          "file-loader",
          {
+            loader: "image-webpack-loader",
+            options: {
+              mozjpeg: {
+                progressive: true,
+                quality: 65,
+              },
+              optipng: {
+                enabled: false,
+              },
+              pngquant: {
+                quality: "65-90",
+                speed: 4,
+              },
+              gifsicle: {
+                interlaced: false,
+              },
+              webp: {
+                quality: 75,
+              }
+            }
+          }
        ]
      }