优化写法

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vue.config.js

@@ -34,13 +34,20 @@ module.exports = {
     // 解决 cli3 热更新失效 https://github.com/vuejs/vue-cli/issues/1559
     config.resolve
       .symlinks(true)
-    if (process.env.NODE_ENV === 'production') {
+    config
+      // 开发环境
+      .when(process.env.NODE_ENV === 'development',
+        // sourcemap不包含列信息
+        config => config.devtool('cheap-source-map')
+      )
+      // 非开发环境
+      .when(process.env.NODE_ENV !== 'development', config => {
         config.optimization
-        // 生产环境移除 console
-        // 其它优化选项 https://segmentfault.com/a/1190000008995453?utm_source=tag-newest#articleHeader12
           .minimizer([
             new UglifyJsPlugin({
               uglifyOptions: {
+                // 移除 console
+                // 其它优化选项 https://segmentfault.com/a/1190000010874406
                 compress: {
                   warnings: false,
                   drop_console: true,
@@ -50,7 +57,7 @@ module.exports = {
               }
             })
           ])
-    }
+      })
     // markdown
     config.module
       .rule('md')